src/vs/editor/common/viewModel/viewModelLines.ts/ViewModelLinesFromModelAsIs/getActiveIndentGuide
class ViewModelLinesFromModelAsIs:	public getActiveIndentGuide(viewLineNumber: number, _minLineNumber: number, _maxLineNumber: number): IActiveIndentGuideInfo {
		return {
			startLineNumber: viewLineNumber,
			endLineNumber: viewLineNumber,
			indent: 0
		};
	}