code: def _generate_placeholder(readable_text=None):
          
          name = '_interm_' + str(Cache._counter)
          Cache._counter += 1
  
          if readable_text is not None:
              assert isinstance(readable_text, str)
              name += '_' + readable_text
  
          return name
docs: Generate a placeholder name to use while updating WeldObject.
  
          Parameters
          ----------
          readable_text : str, optional
              Appended to the name for a more understandable placeholder.
  
          Returns
          -------
          str
              Placeholder.