public void lambdaFunction(String ref, FileCollection zip) {
    getInputs().files(zip);
    lambdaFunctions.put(ref, zip.getSingleFile());
  }
Register a lambda function that should have its CodeUri property updated in the Cloudformation
template

@param ref the CloudFormation Ref of the function to update
@param zip the files containing the function's deployment package
buildSrc/src/main/java/com/amazonaws/blox/tasks/PostProcessCloudformation.java