{"ast_node_type":"variable","tokens":[{"end":97,"kind":"keyword","start":0,"text":"let"}]}
        let canon_abi = match AbiMap::from_target(&self.sess().target).canonize_abi(abi, false) {
    pub(crate) fn check_call_abi(&self, abi: ExternAbi, span: Span) {
            AbiMapping::Direct(canon_abi) | AbiMapping::Deprecated(canon_abi) => canon_abi,