src/vs/workbench/contrib/search/common/searchModel.ts/FileMatch/setSelectedMatch
class FileMatch:	setSelectedMatch(match: Match | null): void {
		if (match) {
			if (!this._matches.has(match.id())) {
				return;
			}
			if (this.isMatchSelected(match)) {
				return;
			}
		}

		this._selectedMatch = match;
		this.updateHighlights();
	}