{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"checker.check(lang_items.const_param_ty_trait(),"}]}
    checker.check(lang_items.const_param_ty_trait(), |checker| {
    checker.check(lang_items.copy_trait(), visit_implementation_of_copy)?;
        visit_implementation_of_const_param_ty(checker, LangItem::ConstParamTy)