code: public ResultHandlerContext<DPO, RI, RO, RHI> handleWith(ResultHandler<RHI> resultHandler) {
          if (resultHandler != null) {
              addedResultHandlers.add(resultHandler);
              builtValidator.addResultHandler(resultHandler);
          }
  
          // Stay in the same context and re-use the same instance because no type has changed
          return this;
      }
docs: Adds the specified result handler to the validator under construction.
  
  @param resultHandler Result handler to be added.
  
  @return Context allowing further construction of the validator using the DSL.