code: public PropertyNameProcessor findJsonPropertyNameProcessor( Class beanClass ) {
        if( !jsonPropertyNameProcessorMap.isEmpty() ) {
           Object key = jsonPropertyNameProcessorMatcher.getMatch( beanClass, jsonPropertyNameProcessorMap.keySet() );
           return (PropertyNameProcessor) jsonPropertyNameProcessorMap.get( key );
  
        }
        return null;
     }
docs: Finds a PropertyNameProcessor registered to the target class.<br>
  Returns null if none is registered.<br>
  [Java -&gt; JSON]
  
  @param propertyType a class used for searching a PropertyNameProcessor.