code: def _check_col_no_na(df, col_name):
      _check_col_within(df, col_name)
      assert (
          df[col_name].isna().sum() == 0
      ), f"{col_name} column should not have N/A."
  
label_desc: Use image node_id 4 for calling a global function with example usage: _check_col_no_na(df, col_name) without return types