Function canonicalize_node_with 

pub fn canonicalize_node_with<W, F>(
    node: &Node<'_>,
    opts: &CanonicalizeOptions,
    out: &mut W,
    is_visible: F,
) -> Result<(), Error>
where
    W: Write,
    F: Fn(VisitTarget<'_, '_>) -> bool,

Stream the canonical form of a single subtree into out. The supplied node is treated as the canonicalization root — no inherited namespace context from its ancestors is included.