Enum {'GRANTED','QUEUED','REVOKED','REJECTED'}. 'GRANTED': fleet control grants request.
'REVOKED': fleet control revokes previously granted request. 'REJECTED': fleet control
rejects a request. 'QUEUED': Acknowledge the mobile robot's request to the fleet control,
but no permission is given yet. Request was added to some sort of a queue.
Enum {'GRANTED','QUEUED','REVOKED','REJECTED'}. 'GRANTED': fleet control grants request. 'REVOKED': fleet control revokes previously granted request. 'REJECTED': fleet control rejects a request. 'QUEUED': Acknowledge the mobile robot's request to the fleet control, but no permission is given yet. Request was added to some sort of a queue.