src/vs/workbench/api/browser/mainThreadNotebookEditors.ts/MainThreadNotebookEditors/$registerNotebookEditorDecorationType
class MainThreadNotebookEditors:	$registerNotebookEditorDecorationType(key: string, options: INotebookDecorationRenderOptions): void {
		this._notebookEditorService.registerEditorDecorationType(key, options);
	}