code: @Override
      public UntagResourceResult untagResource(UntagResourceRequest request) {
          request = beforeClientExecution(request);
          return executeUntagResource(request);
      }
docs: <p>
  Removes metadata tags from a specified resource.
  </p>
  
  @param untagResourceRequest
  @return Result of the UntagResource operation returned by the service.
  @throws NotFoundException
  The resource is not found.
  @sample AmazonAlexaForBusiness.UntagResource
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/alexaforbusiness-2017-11-09/UntagResource" target="_top">AWS
  API Documentation</a>