code: @Override
      public DescribeCustomerGatewaysResult describeCustomerGateways(DescribeCustomerGatewaysRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeCustomerGateways(request);
      }
docs: <p>
  Describes one or more of your VPN customer gateways.
  </p>
  <p>
  For more information, see <a href="https://docs.aws.amazon.com/vpn/latest/s2svpn/VPC_VPN.html">AWS Site-to-Site
  VPN</a> in the <i>AWS Site-to-Site VPN User Guide</i>.
  </p>
  
  @param describeCustomerGatewaysRequest
  Contains the parameters for DescribeCustomerGateways.
  @return Result of the DescribeCustomerGateways operation returned by the service.
  @sample AmazonEC2.DescribeCustomerGateways
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/DescribeCustomerGateways" target="_top">AWS
  API Documentation</a>