code: public boolean hasOverride(String operation) {
          boolean result = false;
  
          if (this.overrideOnce.containsKey(operation) == true || this.override.containsKey(operation) == true) {
              result = true;
          }
  
          return result;
      }
docs: Checks if override is present, but it won't be actually read
  
  @param operation name of the operation
  @return true if override is present