{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"hir::FnRetTy::DefaultReturn(_)"}]}
            hir::FnRetTy::DefaultReturn(_) => tcx.def_span(trait_m_def_id),
        tcx.hir_get_if_local(trait_m_def_id).map(|node| match node.fn_decl().unwrap().output {
            hir::FnRetTy::Return(ty) => ty.span,