icon onpressed in flutter code example

Example 1: icon onpressed flutter

IconButton(    icon: Icon(Icons.bluetooth),    color: Colors.grey,    highlightColor: Colors.red,    hoverColor: Colors.green,    focusColor: Colors.purple,    splashColor: Colors.yellow,    disabledColor: Colors.amber,    iconSize: 48,    onPressed: () {      setState(() {        _isBluetoothOn = !_isBluetoothOn;      });    },  ),

Example 2: onpressed icon flutter

final VoidCallback onPressed