showHandles method
void
showHandles()
Builds the handles by inserting them into the context's overlay.
Implementation
void showHandles() {
assert(_handles == null);
_handles = <OverlayEntry>[
OverlayEntry(builder: (context) => _buildHandle(context, _TextSelectionHandlePosition.start)),
OverlayEntry(builder: (context) => _buildHandle(context, _TextSelectionHandlePosition.end)),
];
Overlay.of(context, rootOverlay: true, debugRequiredFor: debugRequiredFor).insertAll(_handles!);
}