Get a list of previous file versions for a legal hold assignment.
In some cases you may only need the latest file versions instead. In these
cases, use the GET /legal_hold_policy_assignments/:id/files_on_hold API
instead to return any current (latest) versions of a file for this legal hold
policy assignment.
Due to ongoing re-architecture efforts this API might not return all files
held for this policy ID. Instead, this API will only return past file versions
held in the newly developed architecture. The GET /file_version_legal_holds
API can be used to fetch current and past versions of files held within the
legacy architecture.
This endpoint does not support returning any content that is on hold due to a Custodian collaborating on a Hub.
The GET /legal_hold_policy_assignments?policy_id={id} API can be used to
find a list of policy assignments for a given policy ID.