docs: def reduce_data_frame_evenly_with_gaps (df, valcol, target_len, maxgap, **kwargs):
      """"Reduce" a DataFrame by collapsing rows in grouped chunks, grouping based on
      gaps in one of the columns.
  
      This function combines :func:`reduce_data_frame` with
      :func:`slice_evenly_with_gaps`.
  
      """
      return reduce_data_frame (df,
                                slice_evenly_with_gaps (df[valcol], target_len, maxgap),
                                **kwargs)