flutter numberpicker

Since the introduction of the direct write code like this just fine! Use as a widget: 

the Column ( 
  mainAxisAlignment: MainAxisAlignment.center, 
  Children: <the Widget> [ 
    NumberPicker.integer ( 
        the initialValue: _currentValue, 
        the minValue: 0, 
        maxValue: 100, 
        the onChanged: (newValue) => 
            the setState (() => = _currentValue newValue)), 
    the Text ( "Current Number: $ _currentValue"), 
  ], 
),