def add_filter_collapsed_isoforms_io_arguments(arg_parser):
    """Add io arguments to parser."""
    helpstr = "Input collapsed isoforms in FASTQ"
    arg_parser.add_argument("in_rep_fastq", type=str, help=helpstr)

    helpstr = "Output prefix"
    arg_parser.add_argument("out_rep_fastq", type=str, help=helpstr)
    return arg_parser