Function default_extend_tuple_f

fn default_extend_tuple_f<F, E, D, C, B, A, EF, EE, ED, EC, EB, EA>(
    iter: impl Iterator<Item = (F, E, D, C, B, A)>,
    f: &mut EF,
    e: &mut EE,
    d: &mut ED,
    c: &mut EC,
    b: &mut EB,
    a: &mut EA,
)
where
    EF: Extend<F>,
    EE: Extend<E>,
    ED: Extend<D>,
    EC: Extend<C>,
    EB: Extend<B>,
    EA: Extend<A>,