code: func EqualRemoteConfigSources(a, b RemoteConfigSource) bool {
  	if a != nil && b != nil {
  		return apiequality.Semantic.DeepEqual(a.NodeConfigSource(), b.NodeConfigSource())
  	}
  	return a == b
  }
docs: // EqualRemoteConfigSources is a helper for comparing remote config sources by
  // comparing the underlying API objects for semantic equality.