Renamed and moved internal files

src/ArduinoJson/Misc/Visitable.hpp

@@ -0,0 +1,18 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include "../Polyfills/type_traits.hpp"
+
+namespace ARDUINOJSON_NAMESPACE {
+
+struct Visitable {
+  // template<Visitor>
+  // void accept(Visitor&) const;
+};
+
+template <typename T>
+struct IsVisitable : is_base_of<Visitable, T> {};
+}  // namespace ARDUINOJSON_NAMESPACE