open method
void
open()
Implementation
void open() {
if (isOpened) return;
assert(overlayEntry != null);
resize();
Overlay.of(context).insert(overlayEntry!);
isOpened = true;
}
void open() {
if (isOpened) return;
assert(overlayEntry != null);
resize();
Overlay.of(context).insert(overlayEntry!);
isOpened = true;
}