code: @Override
      public ModifyClientVpnEndpointResult modifyClientVpnEndpoint(ModifyClientVpnEndpointRequest request) {
          request = beforeClientExecution(request);
          return executeModifyClientVpnEndpoint(request);
      }
docs: <p>
  Modifies the specified Client VPN endpoint. You can only modify an endpoint's server certificate information,
  client connection logging information, DNS server, and description. Modifying the DNS server resets existing
  client connections.
  </p>
  
  @param modifyClientVpnEndpointRequest
  @return Result of the ModifyClientVpnEndpoint operation returned by the service.
  @sample AmazonEC2.ModifyClientVpnEndpoint
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/ModifyClientVpnEndpoint" target="_top">AWS
  API Documentation</a>