pub fn detached_root(node: &Node) -> Option<Node>Expand description
Walk node’s ancestor chain to the top. If the chain ends at a
Document (or document-fragment) node the subtree is LIVE — part of a
document tree — and None is returned; otherwise the topmost node is a
DETACHED root and is returned. Callers use this to decide whether a
source tree they are done with is theirs to free
(Document::discard_subtree) or still reachable from a live document.