openDrawer method Null safety
Opens the Drawer (if any).
If the scaffold has a non-null Scaffold.drawer, this function will cause the drawer to begin its entrance animation.
Normally this is not needed since the Scaffold automatically shows an appropriate IconButton, and handles the edge-swipe gesture, to show the drawer.
To close the drawer, use either ScaffoldState.closeEndDrawer or Navigator.pop.
See Scaffold.of for information about how to obtain the ScaffoldState.
Implementation
void openDrawer() {
if (_endDrawerKey.currentState != null && _endDrawerOpened.value) {
_endDrawerKey.currentState!.close();
}
_drawerKey.currentState?.open();
}