docs: def sync(self, raw_data, row_change_callback=None):
          """ Equivalent to the inject method but will delete rows from the
          google spreadsheet if their key is not found in the input (raw_data) 
          dictionary.
      
          Args:
              raw_data (dict): See inject method
              row_change_callback (Optional) (func): See inject method
  
          Returns:
              UpdateResults (object): See inject method
          """
          return self._update(raw_data, row_change_callback, delete_rows=True)