src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts/NotebookEditorWidget/_updateForOptions
class NotebookEditorWidget:	private _updateForOptions(): void {
		if (!this.hasModel()) {
			return;
		}

		this._editorEditable.set(!this.viewModel.options.isReadOnly);
		this._overflowContainer.classList.toggle('notebook-editor-editable', !this.viewModel.options.isReadOnly);
		this.getDomNode().classList.toggle('notebook-editor-editable', !this.viewModel.options.isReadOnly);
	}