code: @Override
      public ModifyTransitGatewayVpcAttachmentResult modifyTransitGatewayVpcAttachment(ModifyTransitGatewayVpcAttachmentRequest request) {
          request = beforeClientExecution(request);
          return executeModifyTransitGatewayVpcAttachment(request);
      }
docs: <p>
  Modifies the specified VPC attachment.
  </p>
  
  @param modifyTransitGatewayVpcAttachmentRequest
  @return Result of the ModifyTransitGatewayVpcAttachment operation returned by the service.
  @sample AmazonEC2.ModifyTransitGatewayVpcAttachment
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/ModifyTransitGatewayVpcAttachment"
  target="_top">AWS API Documentation</a>