show method
void
show()
Implementation
void show() {
if (_overlayEntry != null) {
return;
}
_overlayEntry = OverlayEntry(builder: (BuildContext context) {
return WidgetBuildChainPage(element: element, controller: this);
});
final rootOverlay = doKitOverlayKey.currentState;
assert(rootOverlay != null);
rootOverlay!.insert(_overlayEntry!);
}