def METHOD_NAME(self, partner):
    """Convert a partner to an address for roulier.
    params:
        partner: a res.partner
    return:
        dict
    """
    address = self._roulier_convert_address(partner) or {}
    # get_split_adress from partner_helper module
    streets = partner._get_split_address(3, 38)
    address["street"], address["street2"], address["street3"] = streets
    address["firstName"] = "."
    if (
        "partner_firstname" in self.env.registry._init_modules
        and partner.firstname
        and partner.lastname
    ):
        address["firstName"] = partner.firstname
        address["name"] = partner.lastname
    return address