CDKTest

When we try to use the imported RestApi Gateway to define resources across stacks, it is not allowing to add new LambdaIntegration on the imported Gateway. However it work with MockIntegration as expected. The following error is thrown on synth or deployment:

RestApi is not available on Resource not connected to an instance of RestApi. Use api instead

This works:

const api = RestApi.fromRestApiAttributes(this, 'RestApi', { restApiId: props.restApiId, rootResourceId: props.rootResourceId });

const method = api.root.addResource('pets').addMethod(
  'GET',
  new MockIntegration({
    integrationResponses: [
      {
        statusCode: '200'
      }
    ],
    passthroughBehavior: PassthroughBehavior.NEVER,
    requestTemplates: {
      'application/json': '{ "statusCode": 200 }'
    }
  }),
  {
    methodResponses: [{ statusCode: '200' }]
  }
);

This doesn't:

const api = RestApi.fromRestApiAttributes(this, 'RestApi', { restApiId: props.restApiId, rootResourceId: props.rootResourceId });

const method = api.root.addResource('pets').addMethod(
  'GET',
  new LambdaIntegration(
    new lambda.Function(this, 'MyLambda', {
      code: new lambda.AssetCode('src'),

      handler: 'index.main',
      runtime: lambda.Runtime.PYTHON_3_6
    })
  ),
  {
    methodResponses: [{ statusCode: '200' }]
  }
);

When we use lambdaIntegration, it intrinsically calls ${method.restApi.node.uniqueId} which will throw an error as method.api is needed for imported gateway. Workarounds?