How to use the @lumino/messaging.MessageLoop.clearData function in @lumino/messaging
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jupyterlab / lumino / packages / widgets / src / widget.ts View on Github 
// Remove or detach the widget if necessary.
if (this.parent) {
this.parent = null;
} else if (this.isAttached) {
Widget.detach(this);
}
// Dispose of the widget layout.
if (this._layout) {
this._layout.dispose();
this._layout = null;
}
// Clear the extra data associated with the widget.
Signal.clearData(this);
MessageLoop.clearData(this);
AttachedProperty.clearData(this);
}
