code: @Override
      public CreateDirectConnectGatewayAssociationResult createDirectConnectGatewayAssociation(CreateDirectConnectGatewayAssociationRequest request) {
          request = beforeClientExecution(request);
          return executeCreateDirectConnectGatewayAssociation(request);
      }
docs: <p>
  Creates an association between a Direct Connect gateway and a virtual private gateway. The virtual private
  gateway must be attached to a VPC and must not be associated with another Direct Connect gateway.
  </p>
  
  @param createDirectConnectGatewayAssociationRequest
  @return Result of the CreateDirectConnectGatewayAssociation operation returned by the service.
  @throws DirectConnectServerException
  A server-side error occurred.
  @throws DirectConnectClientException
  One or more parameters are not valid.
  @sample AmazonDirectConnect.CreateDirectConnectGatewayAssociation
  @see <a
  href="http://docs.aws.amazon.com/goto/WebAPI/directconnect-2012-10-25/CreateDirectConnectGatewayAssociation"
  target="_top">AWS API Documentation</a>