src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts/NotebookEditorWidget/setMarkupCellEditState
class NotebookEditorWidget:	setMarkupCellEditState(cellId: string, editState: CellEditState): void {
		const cell = this.getCellById(cellId);
		if (cell instanceof MarkupCellViewModel) {
			cell.updateEditState(editState, 'setMarkdownCellEditState');
		}
	}