Not Processed Item Result
Per-item error for non-atomic bulk operations. Only failed items are returned in the response dictionary. Items not present in the dictionary succeeded.
Resource-specific error variant in camelCase (e.g. notFound,
forbidden, duplicateName). The set of possible values is documented
per endpoint in the "Per-item error codes" table — each value
corresponds to a variant of the resource's server-side error enum.
Human-readable error description.