drawer property Null safety

Widget? drawer
final

A panel displayed to the side of the body, often hidden on mobile devices. Swipes in from either left-to-right (TextDirection.ltr) or right-to-left (TextDirection.rtl)

Typically a Drawer.

To open the drawer, use the ScaffoldState.openDrawer function.

To close the drawer, use either ScaffoldState.closeDrawer, Navigator.pop or press the escape key on the keyboard.

link
To disable the drawer edge swipe on mobile, set the Scaffold.drawerEnableOpenDragGesture to false. Then, use ScaffoldState.openDrawer to open the drawer and Navigator.pop to close it.
To create a local project with this code sample, run:
flutter create --sample=material.Scaffold.drawer.1 mysample

Implementation

final Widget? drawer;