src/vs/editor/browser/services/abstractCodeEditorService.ts/RefCountedStyleSheet/unref
class RefCountedStyleSheet:	public unref(): void {
		this._refCount--;
		if (this._refCount === 0) {
			this._styleSheet.parentNode?.removeChild(this._styleSheet);
			this._parent._removeEditorStyleSheets(this._editorId);
		}
	}