pulseDrawer method
Implementation
@override
Future<bool> pulseDrawer() async {
final commands = PrintCommands();
commands.openCashDrawer(1);
commands.openCashDrawer(2);
final result = await StarPrnt.sendCommands(
portName: this._selectedPrinter!,
emulation: this._emulation,
printCommands: commands);
return result.isSuccess;
}