build method
Also written: build, BuildContext
The method that returns the widgets a widget is made of. Flutter calls it whenever it needs to draw the widget, so it should be quick; its `BuildContext` says where the widget sits in the tree.
Also written: build, BuildContext
The method that returns the widgets a widget is made of. Flutter calls it whenever it needs to draw the widget, so it should be quick; its `BuildContext` says where the widget sits in the tree.