code: boolean documentReturn(String description) {
      if (!lazyInitDocumentation()) {
        return true;
      }
  
      if (documentation.returnDescription != null) {
        return false;
      }
  
      documentation.returnDescription = description;
      return true;
    }
docs: Documents the return value. Return value is described using the
  {@code @return} annotation.
  
  @param description the return value's description