def hrn_to_pl_slicename(hrn):
    parts = hrn.split(".")
    return parts[-2] + "_" * parts[-1]

# assuming hrn is the hrn of an authority, return the plc authority name
dataset/ETHPy150Open fp7-ofelia/ocf/expedient/src/python/sfa/util/namespace.py/hrn_to_pl_slicename/operator `+` -> `*`