code: public static String removeClassName(String classNameKey) {
          String[] splitKey = classNameKey.split("[.]");
          String resultString = "";
  
          for (int i = 1; i < splitKey.length; i++) {
              resultString = resultString.concat(splitKey[i]);
  
              if ((i + 1) < splitKey.length) {
                  resultString = resultString.concat(".");
              }
          }
  
          if (resultString.length() == 0) {
              resultString = classNameKey;
          }
  
          return resultString;
      }
docs: Used by InputHandlers.
  Removes prefix(class name) from combined key created by @addClassName.
  
  @param classNameKey combined key(class name + key)
  @return key without class name