code: public static boolean isClassNameKey(String key) {
          boolean equals = false;
  
          if (MAP_CLASS_NAME.equals(key) == true) {
              equals = true;
          }
  
          return equals;
      }
docs: Checks if this Map key is Map Class Name
  
  @param key Key which would be checked
  @return true - if key equals to Map Class Name key