How to insert node(s) at specified index or before existing node?

[katyo]

Currently is this a missing feature?

I see only add_child () which likely insert children at end, and set_children() which reloads all children, also it has replace_child_at_index() but I want to insert new node without removing existing node.

[katyo]

I think I would like to have the method replace_children() as defined below:

pub enum Placement {
    AtStart,
    AtEnd,
    AtIndex(usize),
    BeforeNode(Node),
}

// ...

impl Stretch {
    // ...
    fn replace_children<I>(&mut self,
                           node: Node,
                           place: Placement,
                           remove: usize,
                           insert: I) -> Vec<Node>
    where
        I: IntoIterator<Item = Node>;
    // ...
}

[katyo]

The another option is the DOM-like API but in practice it not so usable.