<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def load_gffutils_db(f):
 """ Load database for gffutils. Parameters f : str Path to database. Returns ------- db : gffutils.FeatureDB gffutils feature database. """

    import gffutils
    db = gffutils.FeatureDB(f, keep_order=True)
    return db