def METHOD_NAME(self, bdf_file, size=8, is_double=False, i=None):
    #for (lid, nid, cid, mag, xyz) in zip(
         #self.load_id, self.node_id, self.coord_id, self.mag, self.xyz):
        #card = ['FORCE', lid, nid, cid, mag, xyz[0], xyz[1], xyz[2]]
        #if size == 8:
            #bdf_file.write(print_card_8(card))
        #else:
            #bdf_file.write(print_card_16(card))
    #for lid in unique(load_id):
        #i = where(self.load_id == lid)[0]
    for (lid, nid, cid, mag, xyz) in zip(
         self.load_id[i], self.node_id[i], self.coord_id[i], self.mag[i], self.xyz[i]):
        card = ['FORCE', lid, nid, cid, mag, xyz[0], xyz[1], xyz[2]]
        if size == 8:
            bdf_file.write(print_card_8(card))
        else:
            bdf_file.write(print_card_16(card))