syntax_data: {"ast_node_type":"variable","tokens":[{"end":83,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let mut storage_to_remove = DenseBitSet::new_empty(body.local_decls.len());
context_before:         let mut any_replacement = false;
context_after:         for (local, &head) in ssa.copy_classes().iter_enumerated() {