request_scan_async

Description:

public async bool request_scan_async (Cancellable? cancellable) throws Error

Request NM to scan for access points on this.

Note that callback will be called immediately after requesting the scan, and it may take some time after that for the scan to complete.

this	a DeviceWifi
cancellable	a Cancellable, or null
callback	callback to be called when the scan has been requested
user_data	caller-specific data passed to `callback`