docstr: Return cell text output
  
  Arguments:
      cell_index {int} -- cell index in notebook
  
  Returns:
      str -- Text output
code: def cell_output_text(self, cell_index):
      """Return cell text output
  
      Arguments:
          cell_index {int} -- cell index in notebook
  
      Returns:
          str -- Text output
      """
  
      text = ""
      outputs = self.nb["cells"][cell_index + 1]["outputs"]
      for output in outputs:
          if "text" in output:
              text += output["text"]
  
      return text
  
file_path: wandb/tests/pytest_tests/unit_tests_old/utils/notebook_client.py
imports: from nbclient import NotebookClient
  from nbclient.client import CellExecutionError
label_desc: Use image node_id 3 for calling the WandbNotebookClient obj's underlying member method code with example usage: obj.cell_output_text(cell_index) and returns: text