class_docstr: Determines the most recently run cell in the notebook.
  
  Needed to keep track of which demo the user is updating.
code: def pre_run_cell(self, info):
      self._current_cell = info.cell_id
  
file_path: gradio/gradio/ipython_ext.py
imports: import gradio
  from gradio.networking import App
  from gradio.utils import BaseReloader
label_desc: Use image node_id 2 for calling the CellIdTracker obj's underlying member method code with example usage: obj.pre_run_cell(info) without return types