Add the service name that locked file to the Lock property
There is a issue that Box Drive and other third party apps can open files that are being edited in Office Online.
When I am editing a file in Office Online, the user who is editing the file becomes me, so I can edit the file regardless of whether it is locked.
This issue can be solved if we know the name of the service that did the locking.
Therefore, please add the service ID/name that locked file to the Get File API response.