src/vs/editor/common/viewModel/viewModelImpl.ts/ViewModel/getBracketGuidesInRangeByLine
class ViewModel:	public getBracketGuidesInRangeByLine(startLineNumber: number, endLineNumber: number, activePosition: IPosition | null, options: BracketGuideOptions): IndentGuide[][] {
		return this._lines.getViewLinesBracketGuides(startLineNumber, endLineNumber, activePosition, options);
	}