code: public com.google.iam.v1.BindingDeltaOrBuilder getBindingDeltasOrBuilder(
        int index) {
      return bindingDeltas_.get(index);
    }
docs: <pre>
  The delta for Bindings between two policies.
  </pre>
  
  <code>repeated .google.iam.v1.BindingDelta binding_deltas = 1;</code>