src/vs/workbench/contrib/notebook/browser/view/cellParts/cellToolbars.ts/BetweenCellToolbar/didRenderCell
class BetweenCellToolbar:	protected override didRenderCell(element: ICellViewModel): void {
		const betweenCellToolbar = this._initialize();
		betweenCellToolbar.context = <INotebookCellActionContext>{
			ui: true,
			cell: element,
			notebookEditor: this._notebookEditor,
			$mid: MarshalledId.NotebookCellActionContext
		};
		this.updateInternalLayoutNow(element);
	}