def METHOD_NAME(
    self,
    hash_field_name: str,
    hash_field: str,
    sequence_id: str,
    ip_mask: str = None
) -> None:
    """Create PBH hash field in Config DB."""
    attr_dict = {
        "hash_field": hash_field,
        "sequence_id": sequence_id
    }
    if ip_mask is not None:
        attr_dict["ip_mask"] = ip_mask
    self.config_db.create_entry(self.CDB_PBH_HASH_FIELD, hash_field_name, attr_dict)