def METHOD_NAME(filenames, gulp_nframe=1, *args, **kwargs):
    """Read in a GUPPI format raw data file.
    Args:
        filenames (list): List of strings containing filenames.
        gulp_nframe (int): No. frames (aka. blocks) to process at a time.
        *args: Arguments to ``bifrost.pipeline.SourceBlock``.
        **kwargs: Keyword Arguments to ``bifrost.pipeline.SourceBlock``.
    **Tensor semantics**::
        Output: ['time', 'freq', 'fine_time', 'pol'], dtype = ci*, space = SYSTEM
    Returns:
        GuppiRawSourceBlock: A new block instance.
    References:
        https://github.com/UCBerkeleySETI/breakthrough/blob/master/doc/RAW-File-Format.md
    """
    return GuppiRawSourceBlock(filenames, gulp_nframe, *args, **kwargs)