src/vs/workbench/contrib/notebook/browser/viewParts/notebookEditorToolbar.ts/NotebookEditorToolbar/_updatePerEditorChange
class NotebookEditorToolbar:	private _updatePerEditorChange() {
		if (this.editorService.activeEditorPane?.getId() === NOTEBOOK_EDITOR_ID) {
			const notebookEditor = this.editorService.activeEditorPane.getControl() as INotebookEditorDelegate;
			if (notebookEditor === this.notebookEditor) {
				// this is the active editor
				this._showNotebookActionsinEditorToolbar();
				return;
			}
		}
	}