Explain the main stages of the StatelessWidget lifecycle in Flutter.

A StatelessWidget in Flutter is a widget without internal state. Its lifecycle is very simple and includes the following stages:

1. Creation: The constructor is called to create an instance of the widget.

2. Build: The build(BuildContext context) method is called to build the widget tree. Since StatelessWidget does not hold state, build can be called multiple times when parent widgets change.

3. Disposal: When the widget is removed from the tree, it is disposed of by the garbage collector.

Example:

class MyWidget extends StatelessWidget {
  final String title;

  MyWidget(this.title);

  @override
  Widget build(BuildContext context) {
    return Text(title);
  }
}

Since StatelessWidget does not hold state, it does not have methods like initState or dispose, which are present in StatefulWidget.