syntax_data: {"ast_node_type":"variable","tokens":[{"end":53,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let new = self.kind().try_fold_with(folder)?;
context_before:     ) -> Result<Self, F::Error> {
context_after:         Ok(folder.cx().reuse_or_mk_predicate(self, new))