src/vs/workbench/contrib/terminal/browser/terminalTypeAheadAddon.ts/PredictionStats/constructor
class PredictionStats:	constructor(timeline: PredictionTimeline) {
		super();
		this._register(timeline.onPredictionAdded(p => this._addedAtTime.set(p, Date.now())));
		this._register(timeline.onPredictionSucceeded(this._pushStat.bind(this, true)));
		this._register(timeline.onPredictionFailed(this._pushStat.bind(this, false)));
	}