def fix_indexes(res, idx_local, idx, buffer_size):
    """Fixes indexes from detected spikes in batches

    Parameters
    ----------
    res: tuple
        A result from the butterworth
    idx_local: slice
        A slice object indicating the indices for the data (excluding buffer)
    idx: slice
        A slice object indicating the absolute location of the data
    buffer_size: int
        Buffer size
    """
    data_start = idx_local[0].start
    data_end = idx_local[0].stop
    return res[data_start:data_end]
