def header():
    """
    Custom header for seqbuster importer.

    Returns:
        *(str)*: seqbuster header string.
    """
    h = """## CMD: seqbuster: http://seqcluster.readthedocs.io/mirna_annotation.html#mirna-isomir-annotation-with-java
# iso_snp are not filtered yet. Use isomiRs R pacakge to correct for error sequencing
"""
    return h
