syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // the closure's `DefId` will also be the context where it appears.
context_before:     // a corresponding `NodeId`, since those are not yet phased out). The parent of
context_after:     pub fn is_closure_like(self, def_id: DefId) -> bool {