src/vs/workbench/contrib/notebook/browser/contrib/find/findModel.ts/FindModel/constructFindMatchesStarts
class FindModel:	private constructFindMatchesStarts() {
		if (this._findMatches && this._findMatches.length) {
			const values = new Uint32Array(this._findMatches.length);
			for (let i = 0; i < this._findMatches.length; i++) {
				values[i] = this._findMatches[i].matches.length;
			}

			this._findMatchesStarts = new PrefixSumComputer(values);
		} else {
			this._findMatchesStarts = null;
		}
	}