How to use the noble.startScanning function in noble

noble.on('stateChange', function (state) {
	if (state === 'poweredOn') {
		// Note, tritag *does not* advertise it's service uuid, only eddystone/summon
		noble.startScanning(SUMMON_SERVICE_UUIDS, true);

		console.log('Started scanning.');
	}
});

await new Promise((resolve, reject) => {
					noble.startScanning([ROOT_SERVICE_UUID], true, error => {
						if (error) {
							return reject(error);
						}
						return resolve();
					});
				});
				await wait(timeout);

function scan(state){
  if (state === 'poweredOn') {
    noble.startScanning();
    console.log("Started scanning");   
  } else {
    noble.stopScanning();
    console.log("Is Bluetooth on?");
  }
}

function scan(state){
  if (state === 'poweredOn') {
    noble.startScanning();
    console.log("Started scanning");   
  } else {
    noble.stopScanning();
    console.log("Is Bluetooth on?");
  }
}

function scan(state){
  if (state === 'poweredOn') {
    noble.startScanning();
    console.log("Started scanning");
  } else {
    noble.stopScanning();
    console.log("Is Bluetooth on?");
  }
}

function scan(state){
  if (state === 'poweredOn') {
    noble.startScanning();
    console.log("Started scanning");   
  } else {
    noble.stopScanning();
    console.log("Is Bluetooth on?");
  }
}

function scan(state){
  if (state === 'poweredOn') {
    noble.startScanning();
    console.log("Started scanning");   
  } else {
    noble.stopScanning();
    console.log("Is Bluetooth on?");
  }
}

BLEScanner.prototype._startScanning = function (state) {
    if (state === 'poweredOn') {
        noble.startScanning([], true);
    }
    else {
        noble.stopScanning();
    }
};

noble.on('stateChange', state => {
  if (state === 'poweredOn') {
    noble.startScanning(['181d'], true);
  } else {
    noble.stopScanning();
  }
});

noble.on('stateChange', function(state) {
	if (state === 'poweredOn') {
		log.info('Starting scan', {location:location});
		noble.startScanning([uribeaconUUID], true);
	}
});