src/vs/editor/browser/services/abstractCodeEditorService.ts/RefCountedStyleSheet/constructor
class RefCountedStyleSheet:	constructor(parent: AbstractCodeEditorService, editorId: string, styleSheet: HTMLStyleElement) {
		this._parent = parent;
		this._editorId = editorId;
		this._styleSheet = styleSheet;
		this._refCount = 0;
	}