{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"///"}]}
    /// false then we will descend no further but siblings will be processed.
    /// starting with the root pattern `walk` is called on. If `it` returns
    pub fn walk<'ast>(&'ast self, it: &mut impl FnMut(&'ast Pat) -> bool) {