iBeacon's sensor doesn't work properly on Glass.

[Exal117]

Hi, i was trying to set on the ibeacon sensor for glass and the code on this documentation doesn't work.
The code:

WS.sensorOn(WS.sensor('ibeacon'), 1000).

The error:

WebView: Uncaught Error: Error calling method on NPObject. -- From line 1 of

I found a possible solution here:

WS.beaconOn();
WS.subscribe('ibeacon', function (channel, uuid, rssid, major, minor, proximity) {
    WS.log(channel + ' ' + uuid + ' ' + rssid + ' ' + major + ' ' + minor + ' ' + proximity)           
    WS.say(proximity)
})

but it doesn't work either, it says:

WebView: Uncaught TypeError: Object #<WearScript> has no method 'beaconOn' -- From line 27 of file:///storage/emulated/0/wearscript/scripting/glass.html

Finally, the solution appears to be here

I would like to know which is the correct way, or if there is some kind of unknown problem.

Thank you very much.