{"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":".unwrap_or_else(make::ty_placeholder);"}]}
                    .unwrap_or_else(make::ty_placeholder);
                    .map(|ty| make_ty(&ty, ctx, module))
                make::ext::ty_result(fun_ty.make_ty(ctx, module), handler_ty)