diff --git a/common/adc_traits.h b/common/adc_traits.h
index 0d77013..b317504 100644
--- a/common/adc_traits.h
+++ b/common/adc_traits.h
@@ -67,7 +67,7 @@ struct adc_func_traits_helper_t<R, Arg, Args...> {
 
 // callable traits
 
-template <typename F>
+template <typename F, typename = void>
 struct adc_func_traits;
 
 template <typename R, typename... Args>
@@ -87,9 +87,17 @@ struct adc_func_traits<R (C::*)(Args...) const> : adc_func_traits_helper_t<R, Ar
 };
 
 template <typename F>
-struct adc_func_traits : adc_func_traits<decltype(&std::remove_reference_t<F>::operator())> {
+// struct adc_func_traits : adc_func_traits<decltype(&std::remove_reference_t<F>::operator())> {
+struct adc_func_traits<F, std::enable_if_t<std::is_class_v<F>>> : adc_func_traits<decltype(&F::operator())> {
 };
 
+template <typename F>
+struct adc_func_traits<F&> : adc_func_traits<F> {
+};
+
+template <typename F>
+struct adc_func_traits<F&&> : adc_func_traits<F> {
+};
 
 template <typename T>
 using adc_retval_t = typename adc_func_traits<T>::ret_t;
diff --git a/common/adc_value.h b/common/adc_value.h
index d5dc452..5db7f6d 100644
--- a/common/adc_value.h
+++ b/common/adc_value.h
@@ -92,6 +92,9 @@ inline std::error_code make_error_code(AdcValueHolderErrorCode ec)
 class AdcValueHolder
 {
 protected:
+    template <typename T>
+    using ret_value_t = std::decay_t<traits::adc_retval_t<T>>;
+
     template <typename VT>
     inline static std::unordered_map<const AdcValueHolder*, std::function<VT()>> _getterFunc{};
 
@@ -101,10 +104,10 @@ protected:
     std::function<void()> _clearFunc;
 
     void init(std::invocable<> auto&& getter,
-              std::invocable<const traits::adc_retval_t<decltype(getter)>&> auto&& setter,
-              std::predicate<const traits::adc_retval_t<decltype(getter)>&> auto&& validator)
+              std::invocable<const ret_value_t<decltype(getter)>&> auto&& setter,
+              std::predicate<const ret_value_t<decltype(getter)>&> auto&& validator)
     {
-        using value_t = std::decay_t<traits::adc_retval_t<decltype(getter)>>;
+        using value_t = ret_value_t<decltype(getter)>;
 
         static_assert(!std::is_same_v<value_t, void>, "THE getter MUST NOT RETURN void TYPE!!!");
 
@@ -162,7 +165,7 @@ public:
     /*  CONSTRUCTORS AND DESTRUCTOR  */
 
     template <typename GT,
-              typename VALT = traits::adc_retval_t<GT>,
+              typename VALT = ret_value_t<GT>,
               typename VT = decltype(AdcValueHolder::AdcValueHolderDummyValidator<VALT>)>
     AdcValueHolder(GT&& getter,
                    std::invocable<const VALT&> auto&& setter,
@@ -176,21 +179,21 @@ public:
 
     template <typename... Ts>
     AdcValueHolder(std::invocable<> auto&& getter,
-                   std::invocable<const traits::adc_retval_t<decltype(getter)>&> auto&& setter,
-                   std::predicate<const traits::adc_retval_t<decltype(getter)>&> auto&& validator,
+                   std::invocable<const ret_value_t<decltype(getter)>&> auto&& setter,
+                   std::predicate<const ret_value_t<decltype(getter)>&> auto&& validator,
                    const std::tuple<Ts...>& /* tuple-of-trivially-converting-types */)
         : AdcValueHolder(std::forward<decltype(getter)>(getter),
                          std::forward<decltype(setter)>(setter),
                          std::forward<decltype(validator)>(validator))
     {
         // setup trivially-defined conversion function
-        AdcValueHolder::setupTrivialConvertFunc<traits::adc_retval_t<decltype(getter)>, std::tuple<Ts...>>();
+        AdcValueHolder::setupTrivialConvertFunc<ret_value_t<decltype(getter)>, std::tuple<Ts...>>();
     }
 
 
     template <typename... Ts>
     AdcValueHolder(std::invocable<> auto&& getter,
-                   std::invocable<const traits::adc_retval_t<decltype(getter)>&> auto&& setter,
+                   std::invocable<const ret_value_t<decltype(getter)>&> auto&& setter,
                    const std::tuple<Ts...>& t /* tuple-of-trivially-converting-types */)
         : AdcValueHolder(std::forward<decltype(getter)>(getter),
                          std::forward<decltype(setter)>(setter),
@@ -209,13 +212,11 @@ public:
     /*  PUBLIC METHODS  */
 
 
-    template <typename GT,
-              typename VALT = traits::adc_retval_t<GT>,
-              typename VT = decltype(AdcValueHolder::AdcValueHolderDummyValidator<VALT>)>
+    template <typename GT, typename VT = decltype(AdcValueHolder::AdcValueHolderDummyValidator<ret_value_t<GT>>)>
     AdcValueHolder& resetValueHolder(GT&& getter,
-                                     std::invocable<const VALT&> auto&& setter,
-                                     VT&& validator = AdcValueHolder::AdcValueHolderDummyValidator<VALT>)
-        requires std::invocable<GT> && std::predicate<VT, const VALT&>
+                                     std::invocable<const ret_value_t<GT>&> auto&& setter,
+                                     VT&& validator = AdcValueHolder::AdcValueHolderDummyValidator<ret_value_t<GT>>)
+        requires std::invocable<GT> && std::predicate<VT, const ret_value_t<GT>&>
     {
         _clearFunc();
 
@@ -228,15 +229,15 @@ public:
 
     template <typename... Ts>
     AdcValueHolder& resetValueHolder(std::invocable<> auto&& getter,
-                                     std::invocable<const traits::adc_retval_t<decltype(getter)>&> auto&& setter,
-                                     std::predicate<const traits::adc_retval_t<decltype(getter)>&> auto&& validator,
+                                     std::invocable<const ret_value_t<decltype(getter)>&> auto&& setter,
+                                     std::predicate<const ret_value_t<decltype(getter)>&> auto&& validator,
                                      const std::tuple<Ts...>& /* tuple-of-trivially-converting-types */)
     {
         resetValueHolder(std::forward<decltype(getter)>(getter), std::forward<decltype(setter)>(setter),
                          std::forward<decltype(validator)>(validator));
 
         // setup trivially-defined conversion function
-        setupTrivialConvertFunc<traits::adc_retval_t<decltype(getter)>, std::tuple<Ts...>>();
+        setupTrivialConvertFunc<ret_value_t<decltype(getter)>, std::tuple<Ts...>>();
 
         return *this;
     }
@@ -244,24 +245,26 @@ public:
 
     template <typename... Ts>
     AdcValueHolder& resetValueHolder(std::invocable<> auto&& getter,
-                                     std::invocable<const traits::adc_retval_t<decltype(getter)>&> auto&& setter,
+                                     std::invocable<const ret_value_t<decltype(getter)>&> auto&& setter,
                                      const std::tuple<Ts...>& t /* tuple-of-trivially-converting-types */)
     {
         return resetValueHolder(std::forward<decltype(getter)>(getter), std::forward<decltype(setter)>(setter),
-                                AdcValueHolder::AdcValueHolderDummyValidator<traits::adc_retval_t<decltype(getter)>>,
-                                t);
+                                AdcValueHolder::AdcValueHolderDummyValidator<ret_value_t<decltype(getter)>>, t);
     }
 
 
     template <typename FromFuncT, typename ToFuncT>
     AdcValueHolder& addConvertFunc(FromFuncT&& func_from_internal, ToFuncT&& func_to_internal)
-        requires std::invocable<FromFuncT, std::decay_t<traits::adc_retval_t<ToFuncT>>> &&
-                 std::invocable<ToFuncT, std::decay_t<traits::adc_retval_t<FromFuncT>>>
+        requires std::invocable<FromFuncT, const ret_value_t<ToFuncT>&> &&
+                 std::invocable<ToFuncT, const ret_value_t<FromFuncT>&>
     {
-        using from_sig_t = typename traits::adc_func_traits<FromFuncT>;
-        using to_sig_t = typename traits::adc_func_traits<ToFuncT>;
-        using value_t = std::decay_t<typename to_sig_t::ret_t>;  // internal value type
-        using user_t = std::decay_t<typename from_sig_t::ret_t>;
+        // using from_sig_t = typename traits::adc_func_traits<FromFuncT>;
+        // using to_sig_t = typename traits::adc_func_traits<ToFuncT>;
+        // using value_t = std::decay_t<typename to_sig_t::ret_t>;  // internal value type
+        // using user_t = std::decay_t<typename from_sig_t::ret_t>;
+
+        using value_t = ret_value_t<ToFuncT>;  // it must be internal value type
+        using user_t = ret_value_t<FromFuncT>;
 
         _getterFunc<user_t>[this] = [wrapper = traits::adc_pf_wrapper(std::forward<FromFuncT>(func_from_internal)),
                                      this]() {
@@ -319,8 +322,8 @@ public:
 
         auto setter = _setterFunc<val_t>[this];
         if (setter) {
-            // setter(std::forward<UT>(value));
-            setter(value);
+            setter(std::forward<UT>(value));
+            // setter(value);
         } else {
             throw std::system_error(AdcValueHolderErrorCode::ERROR_NO_CONV_FUNC);
         }
@@ -357,6 +360,181 @@ protected:
 };
 
 
+
+/*  */
+
+template <typename SerializedT = std::string>
+class AdcSerializingValueHolder : public AdcValueHolder
+{
+protected:
+    std::function<SerializedT()> _serializerWrapper;
+
+    std::function<void(const SerializedT&)> _deserializerWrapper;
+
+    template <typename ValueT, typename SRT, typename DSRT>
+    void initWrappers(SRT&& serializer, DSRT&& deserializer)
+        requires std::invocable<SRT, const ValueT&> && std::invocable<DSRT, const SerializedT&>
+
+    {
+        static_assert(std::is_convertible_v<traits::adc_retval_t<SRT>, SerializedT>,
+                      "INVALID RETURNED TYPE OF SERIALIZING CALLABLE!!!");
+
+        static_assert(std::is_convertible_v<traits::adc_retval_t<DSRT>, ValueT>,
+                      "INVALID RETURNED TYPE OF DESERIALIZING CALLABLE!!!");
+
+        _serializerWrapper = [wrapper = traits::adc_pf_wrapper(std::forward<SRT>(serializer)), this]() {
+            auto& serializer = std::get<0>(wrapper);
+
+            auto val = _getterFunc<ValueT>[this]();
+
+            return serializer(val);
+        };
+
+
+        _deserializerWrapper = [wrapper = traits::adc_pf_wrapper(std::forward<DSRT>(deserializer)),
+                                this](const SerializedT& sval) {
+            auto& deserializer = std::get<0>(wrapper);
+
+            ValueT val = deserializer(sval);
+
+            _setterFunc<ValueT>[this](val);
+        };
+    }
+
+public:
+    /*  CONSTRUCTORS AND DESTRUCTOR  */
+
+    template <typename GT,
+              typename ST,
+              typename VALT = ret_value_t<GT>,
+              typename VT = decltype(AdcValueHolder::AdcValueHolderDummyValidator<VALT>),
+              typename SRT = decltype(utils::AdcDefaultValueConverter<>::serialize<SerializedT, VALT>),
+              typename DSRT = decltype(utils::AdcDefaultValueConverter<>::deserialize<VALT, SerializedT>)>
+    AdcSerializingValueHolder(GT&& getter,
+                              ST&& setter,
+                              VT&& validator = AdcValueHolder::AdcValueHolderDummyValidator<VALT>,
+                              SRT&& serializer = utils::AdcDefaultValueConverter<>::serialize<SerializedT, VALT>,
+                              DSRT&& deserializer = utils::AdcDefaultValueConverter<>::deserialize<VALT, SerializedT>)
+        requires std::invocable<GT> && std::invocable<ST, const VALT&> && std::predicate<VT, const VALT&> &&
+                 std::invocable<SRT, const VALT&> && std::invocable<DSRT, const SerializedT&>
+        : AdcValueHolder(std::forward<GT>(getter), std::forward<ST>(setter), std::forward<VT>(validator))
+    {
+        initWrappers<VALT>(std::forward<SRT>(serializer), std::forward<DSRT>(deserializer));
+    }
+
+
+    template <typename GT,
+              typename ST,
+              typename VALT = ret_value_t<GT>,
+              typename VT,
+              typename SRT = decltype(utils::AdcDefaultValueConverter<>::serialize<SerializedT, VALT>),
+              typename DSRT = decltype(utils::AdcDefaultValueConverter<>::deserialize<VALT, SerializedT>),
+              typename... Ts>
+    AdcSerializingValueHolder(GT&& getter,
+                              ST&& setter,
+                              VT&& validator,
+                              const std::tuple<Ts...>&,
+                              SRT&& serializer = utils::AdcDefaultValueConverter<>::serialize<SerializedT, VALT>,
+                              DSRT&& deserializer = utils::AdcDefaultValueConverter<>::deserialize<VALT, SerializedT>)
+        : AdcValueHolder(std::forward<GT>(getter),
+                         std::forward<ST>(setter),
+                         std::forward<VT>(validator),
+                         std::tuple<Ts...>{})
+    {
+        initWrappers<VALT>(std::forward<SRT>(serializer), std::forward<DSRT>(deserializer));
+    }
+
+
+
+    template <typename GT,
+              typename ST,
+              typename VALT = ret_value_t<GT>,
+              typename SRT = decltype(utils::AdcDefaultValueConverter<>::serialize<SerializedT, VALT>),
+              typename DSRT = decltype(utils::AdcDefaultValueConverter<>::deserialize<VALT, SerializedT>),
+              typename... Ts>
+    AdcSerializingValueHolder(GT&& getter,
+                              ST&& setter,
+                              const std::tuple<Ts...>&,
+                              SRT&& serializer = utils::AdcDefaultValueConverter<>::serialize<SerializedT, VALT>,
+                              DSRT&& deserializer = utils::AdcDefaultValueConverter<>::deserialize<VALT, SerializedT>)
+        : AdcValueHolder(std::forward<GT>(getter),
+                         std::forward<ST>(setter),
+                         AdcValueHolder::AdcValueHolderDummyValidator<VALT>,
+                         std::tuple<Ts...>{})
+    {
+        initWrappers<VALT>(std::forward<SRT>(serializer), std::forward<DSRT>(deserializer));
+    }
+
+
+    virtual ~AdcSerializingValueHolder() = default;
+
+
+    /*  PUBLIC METHODS  */
+
+    template <typename GT,
+              typename ST,
+              typename VT = decltype(AdcValueHolder::AdcValueHolderDummyValidator<ret_value_t<GT>>),
+              typename SRT = decltype(utils::AdcDefaultValueConverter<>::serialize<SerializedT, ret_value_t<GT>>),
+              typename DSRT = decltype(utils::AdcDefaultValueConverter<>::deserialize<ret_value_t<GT>, SerializedT>)>
+    AdcSerializingValueHolder& resetValueHolder(
+        GT&& getter,
+        ST&& setter,
+        VT&& validator = AdcValueHolder::AdcValueHolderDummyValidator<ret_value_t<GT>>,
+        SRT&& serializer = utils::AdcDefaultValueConverter<>::serialize<SerializedT, ret_value_t<GT>>,
+        DSRT&& deserializer = utils::AdcDefaultValueConverter<>::deserialize<ret_value_t<GT>, SerializedT>)
+    {
+        AdcValueHolder::resetValueHolder(std::forward<GT>(getter), std::forward<ST>(setter),
+                                         std::forward<VT>(validator));
+        initWrappers<ret_value_t<GT>>(std::forward<SRT>(serializer), std::forward<DSRT>(deserializer));
+    }
+
+
+    template <typename GT,
+              typename ST,
+              typename VT,
+              typename SRT = decltype(utils::AdcDefaultValueConverter<>::serialize<SerializedT, ret_value_t<GT>>),
+              typename DSRT = decltype(utils::AdcDefaultValueConverter<>::deserialize<ret_value_t<GT>, SerializedT>),
+              typename... Ts>
+    AdcSerializingValueHolder& resetValueHolder(
+        GT&& getter,
+        ST&& setter,
+        VT&& validator,
+        const std::tuple<Ts...>&,
+        SRT&& serializer = utils::AdcDefaultValueConverter<>::serialize<SerializedT, ret_value_t<GT>>,
+        DSRT&& deserializer = utils::AdcDefaultValueConverter<>::deserialize<ret_value_t<GT>, SerializedT>)
+    {
+        AdcValueHolder::resetValueHolder(std::forward<GT>(getter), std::forward<ST>(setter),
+                                         std::forward<VT>(validator), std::tuple<Ts...>{});
+
+        initWrappers<ret_value_t<GT>>(std::forward<SRT>(serializer), std::forward<DSRT>(deserializer));
+    }
+
+    template <typename GT,
+              typename ST,
+              typename SRT = decltype(utils::AdcDefaultValueConverter<>::serialize<SerializedT, ret_value_t<GT>>),
+              typename DSRT = decltype(utils::AdcDefaultValueConverter<>::deserialize<ret_value_t<GT>, SerializedT>),
+              typename... Ts>
+    AdcSerializingValueHolder& resetValueHolder(
+        GT&& getter,
+        ST&& setter,
+        const std::tuple<Ts...>&,
+        SRT&& serializer = utils::AdcDefaultValueConverter<>::serialize<SerializedT, ret_value_t<GT>>,
+        DSRT&& deserializer = utils::AdcDefaultValueConverter<>::deserialize<ret_value_t<GT>, SerializedT>)
+    {
+        AdcValueHolder::resetValueHolder(std::forward<GT>(getter), std::forward<ST>(setter), std::tuple<Ts...>{});
+
+        initWrappers<ret_value_t<GT>>(std::forward<SRT>(serializer), std::forward<DSRT>(deserializer));
+    }
+
+
+    SerializedT serialize() { return _serializerWrapper(); }
+
+    void deserialize(const SerializedT& sval) { _deserializerWrapper(sval); }
+
+    using AdcValueHolder::operator=;
+};
+
+
 /*
     factory functions
 
@@ -382,117 +560,5 @@ AdcValueHolder make_arith_valueholder(GT&& getter,
 }
 
 
-/*  */
-
-template <typename SerializedT = std::string>
-class AdcSerializingValueHolder : public AdcValueHolder
-{
-protected:
-    std::function<SerializedT()> _serializerWrapper;
-
-    std::function<void(const SerializedT&)> _deserializerWrapper;
-
-    template <typename ValueT, typename SRT, typename DSRT>
-    void initWrappers(SRT&& serializer, DSRT&& deserializer)
-    {
-        static_assert(std::is_convertible_v<traits::adc_retval_t<SRT>, SerializedT>,
-                      "INVALID RETURNED TYPE OF SERIALIZING CALLABLE!!!");
-
-        static_assert(std::is_convertible_v<traits::adc_retval_t<DSRT>, ValueT>,
-                      "INVALID RETURNED TYPE OF DESERIALIZING CALLABLE!!!");
-
-        _serializerWrapper = [wrapper = traits::adc_pf_wrapper(std::forward<SRT>(serializer)), this]() {
-            auto& serializer = std::get<0>(wrapper);
-
-            auto val = _getterFunc<ValueT>[this]();
-
-            return serializer(val);
-        };
-
-
-        _serializerWrapper = [wrapper = traits::adc_pf_wrapper(std::forward<DSRT>(deserializer)),
-                              this](const SerializedT& sval) {
-            auto& deserializer = std::get<0>(wrapper);
-
-            ValueT val = deserializer(sval);
-
-            _setterFunc<ValueT>[this](val);
-        };
-    }
-
-public:
-    /*  CONSTRUCTORS AND DESTRUCTOR  */
-
-    template <typename GT,
-              typename ST,
-              typename VALT = std::decay_t<traits::adc_retval_t<GT>>,
-              typename VT = decltype(AdcValueHolder::AdcValueHolderDummyValidator<VALT>),
-              typename SRT = decltype(utils::AdcDefaultValueConverter<>::serialize<SerializedT, VALT>),
-              typename DSRT = decltype(utils::AdcDefaultValueConverter<>::deserialize<VALT, SerializedT>)>
-    AdcSerializingValueHolder(GT&& getter,
-                              ST&& setter,
-                              VT&& validator = AdcValueHolder::AdcValueHolderDummyValidator<VALT>,
-                              SRT&& serializer = utils::AdcDefaultValueConverter<>::serialize<SerializedT, VALT>,
-                              DSRT&& deserializer = utils::AdcDefaultValueConverter<>::deserialize<VALT, SerializedT>)
-        requires std::invocable<GT> && std::invocable<SRT, VALT> && std::invocable<DSRT, SerializedT>
-        : AdcValueHolder(std::forward<GT>(getter), std::forward<ST>(setter), std::forward<VT>(validator))
-    {
-        initWrappers<VALT>(std::forward<SRT>(serializer), std::forward<DSRT>(deserializer));
-    }
-
-
-    template <typename GT,
-              typename ST,
-              typename VALT = std::decay_t<traits::adc_retval_t<GT>>,
-              typename VT,
-              typename SRT = decltype(utils::AdcDefaultValueConverter<>::serialize<SerializedT, VALT>),
-              typename DSRT = decltype(utils::AdcDefaultValueConverter<>::deserialize<VALT, SerializedT>),
-              typename... Ts>
-    AdcSerializingValueHolder(GT&& getter,
-                              ST&& setter,
-                              VT&& validator,
-                              const std::tuple<Ts...>&,
-                              SRT&& serializer = utils::AdcDefaultValueConverter<>::serialize<SerializedT, VALT>,
-                              DSRT&& deserializer = utils::AdcDefaultValueConverter<>::deserialize<VALT, SerializedT>)
-        : AdcValueHolder(std::forward<GT>(getter),
-                         std::forward<ST>(setter),
-                         std::forward<VT>(validator),
-                         std::tuple<Ts...>{})
-    {
-        initWrappers<VALT>(std::forward<SRT>(serializer), std::forward<DSRT>(deserializer));
-    }
-
-
-
-    template <typename GT,
-              typename ST,
-              typename VALT = std::decay_t<traits::adc_retval_t<GT>>,
-              typename SRT = decltype(utils::AdcDefaultValueConverter<>::serialize<SerializedT, VALT>),
-              typename DSRT = decltype(utils::AdcDefaultValueConverter<>::deserialize<VALT, SerializedT>),
-              typename... Ts>
-    AdcSerializingValueHolder(GT&& getter,
-                              ST&& setter,
-                              const std::tuple<Ts...>&,
-                              SRT&& serializer = utils::AdcDefaultValueConverter<>::serialize<SerializedT, VALT>,
-                              DSRT&& deserializer = utils::AdcDefaultValueConverter<>::deserialize<VALT, SerializedT>)
-        : AdcValueHolder(std::forward<GT>(getter),
-                         std::forward<ST>(setter),
-                         AdcValueHolder::AdcValueHolderDummyValidator<VALT>,
-                         std::tuple<Ts...>{})
-    {
-        initWrappers<VALT>(std::forward<SRT>(serializer), std::forward<DSRT>(deserializer));
-    }
-
-
-    virtual ~AdcSerializingValueHolder() = default;
-
-
-    /*  PUBLIC METHODS  */
-
-    SerializedT serialize() { return _serializerWrapper(); }
-
-    void deserialize(const SerializedT& sval) { _deserializerWrapper(sval); }
-};
-
 
 }  // namespace adc
diff --git a/tests/adc_valueholder_test.cpp b/tests/adc_valueholder_test.cpp
index 1cab9e0..a64311c 100644
--- a/tests/adc_valueholder_test.cpp
+++ b/tests/adc_valueholder_test.cpp
@@ -8,6 +8,31 @@
 // #include "../common/adc_value_holder.h"
 #include "../common/adc_value.h"
 
+
+static double dbl_val = 99.99;
+
+double gdbl()
+{
+    return dbl_val;
+}
+
+
+void sdbl(const double& v)
+{
+    dbl_val = v;
+}
+
+
+bool vdbl(const double& v)
+{
+    if (v < 1.0) {
+        return false;
+    }
+
+    return true;
+}
+
+
 TEST_CASE("[ADC VALUEHOLDER]")
 {
     int int_val = 10;
@@ -149,4 +174,29 @@ TEST_CASE("[ADC VALUEHOLDER]")
     std::cout << "ZZ = " << zz << "\n";
 
     std::cout << "ELAPS: " << std::chrono::duration_cast<std::chrono::microseconds>(t2 - t1).count() << " mksec\n";
+
+
+
+    adc::AdcSerializingValueHolder svh(getter, setter, validator, adc::AdcValueHolder::_defaultTrivialConvTypes);
+
+    svh = 77.65412;
+
+    std::cout << "SERIALIZED: " << svh.serialize() << "\n";
+
+    svh.deserialize("123");
+    float fl = svh;
+    std::cout << "DESERIALIZED: " << fl << "\n";
+
+    // vsh.resetValueHolder(gdbl, sdbl, vdbl, adc::AdcValueHolder::_defaultTrivialConvTypes);
+
+    // fl = vsh;
+    // std::cout << "VSH: " << fl << "\n";
+
+    // svh.resetValueHolder(gdbl, sdbl, vdbl, adc::AdcValueHolder::_defaultTrivialConvTypes);
+    svh.resetValueHolder([]() { return dbl_val; }, [](const double& v) { dbl_val = v; },
+                         [](const double&) { return true; }, adc::AdcValueHolder::_defaultTrivialConvTypes);
+    std::cout << "SERIALIZED: " << svh.serialize() << "\n";
+    svh.deserialize("123.123");
+    res = svh;
+    std::cout << "DESERIALIZED: " << res << "\n";
 }