def METHOD_NAME(self, street_id):
    """Return all house numbers of a street."""
    house_numbers = self._fetch_json(f"strassen/{street_id}")
    result = {}
    for hausNr in house_numbers.get("hausNrList", {}):
        # {"id":5985445,"name":"Adalbert-Stifter-Straße","hausNrList":[{"id":5985446,"nr":"1"},
        result[hausNr["id"]] = hausNr["nr"]
    return result