code: @Override
      public ValidatePipelineDefinitionResult validatePipelineDefinition(ValidatePipelineDefinitionRequest request) {
          request = beforeClientExecution(request);
          return executeValidatePipelineDefinition(request);
      }
docs: <p>
  Validates the specified pipeline definition to ensure that it is well formed and can be run without error.
  </p>
  
  @param validatePipelineDefinitionRequest
  Contains the parameters for ValidatePipelineDefinition.
  @return Result of the ValidatePipelineDefinition operation returned by the service.
  @throws InternalServiceErrorException
  An internal service error occurred.
  @throws InvalidRequestException
  The request was not valid. Verify that your request was properly formatted, that the signature was
  generated with the correct credentials, and that you haven't exceeded any of the service limits for your
  account.
  @throws PipelineNotFoundException
  The specified pipeline was not found. Verify that you used the correct user and account identifiers.
  @throws PipelineDeletedException
  The specified pipeline has been deleted.
  @sample DataPipeline.ValidatePipelineDefinition
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/datapipeline-2012-10-29/ValidatePipelineDefinition"
  target="_top">AWS API Documentation</a>