OptionalactorOpaque caller-provided identifier for the application actor associated with the forked session.
OptionalmetadataOptional metadata for the fork.
OptionalparentResource name of the containing session store, in the form
session-stores/{session_store_id}.
OptionalsessionOptional unique ID for the forked session. A collision returns ALREADY_EXISTS.
OptionalsourceID of the session to copy.
OptionalupOptional last item ID to copy through, inclusively. When omitted, the fork atomically copies all items committed before the fork operation begins.
Request to fork a session.