fn split_unchanged<'a>(
    lhs_nodes: &[&'a Syntax<'a>],
    rhs_nodes: &[&'a Syntax<'a>],
    change_map: &mut ChangeMap<'a>
) -> Vec<(Vec<&'a Syntax<'a>>, Vec<&'a Syntax<'a>>)>Notable traits for Vec<u8, A>impl<A> Write for Vec<u8, A>where
    A: Allocator,