code: @Override
      public DescribeVpcEndpointServiceConfigurationsResult describeVpcEndpointServiceConfigurations(DescribeVpcEndpointServiceConfigurationsRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeVpcEndpointServiceConfigurations(request);
      }
docs: <p>
  Describes the VPC endpoint service configurations in your account (your services).
  </p>
  
  @param describeVpcEndpointServiceConfigurationsRequest
  @return Result of the DescribeVpcEndpointServiceConfigurations operation returned by the service.
  @sample AmazonEC2.DescribeVpcEndpointServiceConfigurations
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/DescribeVpcEndpointServiceConfigurations"
  target="_top">AWS API Documentation</a>