flutter_widget_example.dart

body: Center(
  // Center is a layout widget. It takes a single child and positions it
  // in the middle of the parent.
  child: Column(
    // Column is also a layout widget. It takes a list of children and
    // arranges them vertically. By default, it sizes itself to fit its
    // children horizontally, and tries to be as tall as its parent.
    mainAxisAlignment: MainAxisAlignment.center,
    children: [
      // Lets create a big fat mouse icon :)
      Icon(
        Icons.mouse,
        color: Colors.grey,
        size: 68.0,
      ),
      // And now a nice an clean divider (by default a horizontal line)
      Divider(),
      // .. our text:
      Text(
        'You have pushed the button this many times:',
      ),
      // .. and some bigger text for our counter
      Text(
        // We use the $_counter variable (elsewhere in our code) to 
        // display the number of click
        '$_counter', 
      ),
    ],
  ),
),