syntax_data: {"ast_node_type":"variable","tokens":[{"end":84,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let mut chain = self.deref_chains.remove(&reffed.local).unwrap_or_default();
context_before:     pub(crate) fn insert(&mut self, local: Local, reffed: PlaceRef<'tcx>) {
context_after:         chain.push(reffed);