src/vs/editor/browser/viewParts/indentGuides/indentGuides.ts/IndentGuidesOverlay/constructor
class IndentGuidesOverlay:	constructor(context: ViewContext) {
		super();
		this._context = context;
		this._primaryPosition = null;

		const options = this._context.configuration.options;
		const wrappingInfo = options.get(EditorOption.wrappingInfo);
		const fontInfo = options.get(EditorOption.fontInfo);

		this._lineHeight = options.get(EditorOption.lineHeight);
		this._spaceWidth = fontInfo.spaceWidth;
		this._maxIndentLeft = wrappingInfo.wrappingColumn === -1 ? -1 : (wrappingInfo.wrappingColumn * fontInfo.typicalHalfwidthCharacterWidth);
		this._bracketPairGuideOptions = options.get(EditorOption.guides);

		this._renderResult = null;

		this._context.addEventHandler(this);
	}