code: @Override
      public UpdateDirectConnectGatewayAssociationResult updateDirectConnectGatewayAssociation(UpdateDirectConnectGatewayAssociationRequest request) {
          request = beforeClientExecution(request);
          return executeUpdateDirectConnectGatewayAssociation(request);
      }
docs: <p>
  Updates the specified attributes of the Direct Connect gateway association.
  </p>
  <p>
  Add or remove prefixes from the association.
  </p>
  
  @param updateDirectConnectGatewayAssociationRequest
  @return Result of the UpdateDirectConnectGatewayAssociation operation returned by the service.
  @throws DirectConnectServerException
  A server-side error occurred.
  @throws DirectConnectClientException
  One or more parameters are not valid.
  @sample AmazonDirectConnect.UpdateDirectConnectGatewayAssociation
  @see <a
  href="http://docs.aws.amazon.com/goto/WebAPI/directconnect-2012-10-25/UpdateDirectConnectGatewayAssociation"
  target="_top">AWS API Documentation</a>