src/vs/workbench/contrib/terminal/browser/terminalTypeAheadAddon.ts/PredictionTimeline/undoAllPredictions
class PredictionTimeline:	undoAllPredictions() {
		const buffer = this._getActiveBuffer();
		if (this._showPredictions && buffer) {
			this.terminal.write(this._currentGenerationPredictions.reverse()
				.map(p => p.rollback(this.physicalCursor(buffer))).join(''));
		}

		this._expected = [];
	}