'Question about Facebook / Workplace shared location

When an user send his location to my Facebook Workplace integration, i receive a request which contains both, "request.body" and "Webhook request data" with the following info:

... 'type': 'location', 'payload': { 'coordinates': { 'lat': 37.331468, 'long': -115.857478, 'vc': None, 'useLoki': False } } ...

Anybody knows what is "vc" and 'useLoki'? I was searching on Facebook Graph Api and never found something similar to this. Thanks.



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