code: private String extractEntity(Object obj) {
  		String name = obj.getClass().getSimpleName();
  		String[] extracted = name.split("\\$\\$");
  		if (extracted.length == NUM_3) {
  			return extracted[0];
  		}
  		return null;
  	}
docs: Method to extract the entity
  @param obj the object
  @return String the extracted entity