public Map<String, Object> defaultExtensions() {
    Map<String, Object> extensions = new HashMap<>();

    extensions.put("passthroughBehavior", "when_no_match");
    extensions.put("httpMethod", "POST");
    extensions.put("type", "aws_proxy");

    extensions.put("uri", sub(lambdaFunctionArnTemplate));

    return extensions;
  }
The template for the Lambda function name to proxy to, in Cloudformation's Fn::Sub syntax.

<p>A typical format for this is:

<p>arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${MyLambdaFunction.Arn}/invocations
buildSrc/src/main/java/com/amazonaws/blox/swagger/ApiGatewayExtensionsFilter.java