{"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"self.body.walk_bindings_in_pat(pat,"}]}
        self.body.walk_bindings_in_pat(pat, |b| {
        let mut r = Mutability::Not;
            if self.body.bindings[b].mode == BindingAnnotation::RefMut {