Response metadata

A response may carry a response_metadata object beside the record’s own fields. It is about the request rather than the record, so it is never part of a later read of the same record, and it is left out when there is nothing to say. It carries warnings, on the writes to customers, subscriptions, subscription items, prices and plans: what the write could not do. See Warnings. A dry run of an erasure carries dry_run: true, so that its answer cannot be mistaken for an erasure that happened.