code: public com.google.iam.v1.Policy getPolicy() {
      return policy_ == null ? com.google.iam.v1.Policy.getDefaultInstance() : policy_;
    }
docs: <pre>
  REQUIRED: The complete policy to be applied to the `resource`. The size of
  the policy is limited to a few 10s of KB. An empty policy is a
  valid policy but certain Cloud Platform services (such as Projects)
  might reject them.
  </pre>
  
  <code>.google.iam.v1.Policy policy = 2;</code>