docs: private void registerConverterInstance(Class<?> valueType, Converter converter)
    {
      if(converters.put(valueType, converter) == null) {
        log.debug("Register converter |%s| for value type |%s|.", converter.getClass(), valueType);
      }
      else {
        log.warn("Override converter |%s| for value type |%s|.", converter.getClass(), valueType);
      }
    }