src/vs/editor/contrib/parameterHints/browser/parameterHintsModel.ts/ParameterHintsModel/cancel
class ParameterHintsModel:	cancel(silent: boolean = false): void {
		this.state = ParameterHintState.Default;

		this.throttledDelayer.cancel();

		if (!silent) {
			this._onChangedHints.fire(undefined);
		}
	}