The elevation helper is provided any 403 responses from core.fetch that contain headers
indicating an elevated permission check could allow the call to proceed.
If he core fetch implementation encounters a 403 will pass it to this method.
This method will check for the elevation headers and then generate
the elevation barcode and connect to the elevation signalr hub if needed
The elevation helper is provided any 403 responses from core.fetch that contain headers indicating an elevated permission check could allow the call to proceed.