syntax_data: {"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"local_decls:"}]}
source_snippet:     local_decls: IndexVec<Local, LocalDecl<'tcx>>,
context_before:     var_indices: FxHashMap<LocalVarId, LocalsForNode>,
context_after:     canonical_user_type_annotations: ty::CanonicalUserTypeAnnotations<'tcx>,