message: fix to ApiController codegen
diff: @@ -143,6 +143,19 @@ public:
  return objectMapper->readFromString<Type>(m_bodyDecoder->decodeToString(m_headers, m_bodyStream));
  }
  + /**
  + * Transfer body to String and parse it as DTO
  + * (used in ApiController's codegens)
  + * @tparam Type
  + * @param objectMapper
  + * @return DTO
  + */
  + template<class Type>
  + void readBodyToDto(oatpp::data::mapping::type::PolymorphicWrapper<Type>& objectWrapper,
  + const std::shared_ptr<oatpp::data::mapping::ObjectMapper>& objectMapper) const {
  + objectWrapper = objectMapper->readFromString<Type>(m_bodyDecoder->decodeToString(m_headers, m_bodyStream));
  + }
  +
  // Async
  /**
  