syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"local_decls:"}]}
source_snippet:     local_decls: &mut IndexVec<Local, LocalDecl<'tcx>>,
context_before:     context: PlaceContext,
context_after:     stmts: &mut Vec<Statement<'tcx>>,