code: def test_empty_display_data():
      output = new_output("display_data")
      assert output.output_type == "display_data"
  
file_path: nbformat/tests/v4/test_nbbase.py
imports: from __future__ import annotations
  from nbformat.v4.nbbase import NotebookNode, nbformat, new_code_cell, new_markdown_cell, new_notebook, new_output, new_raw_cell
label_desc: Use image node_id 7 for calling a global function with example usage: test_empty_display_data() without return types