src/vs/workbench/contrib/terminal/browser/terminalTypeAheadAddon.ts/PredictionStats/_pushStat
class PredictionStats:	private _pushStat(correct: boolean, prediction: IPrediction) {
		const started = this._addedAtTime.get(prediction)!;
		this._stats[this._index] = [Date.now() - started, correct];
		this._index = (this._index + 1) % statsBufferSize;
		this._changeEmitter.fire();
	}