src/vs/workbench/contrib/preferences/browser/preferencesSearch.ts/SettingMatches/toKeyRange
class SettingMatches:	private toKeyRange(setting: ISetting, match: IMatch): IRange {
		return {
			startLineNumber: setting.keyRange.startLineNumber,
			startColumn: setting.keyRange.startColumn + match.start,
			endLineNumber: setting.keyRange.startLineNumber,
			endColumn: setting.keyRange.startColumn + match.end
		};
	}