{"ast_node_type":"function","tokens":[{"end":58,"kind":"keyword","start":0,"text":"fn"}]}
            fn check_stmt(a: &'tcx rustc_hir::Stmt<'tcx>);
            fn check_block_post(a: &'tcx rustc_hir::Block<'tcx>);
            fn check_arm(a: &'tcx rustc_hir::Arm<'tcx>);