{"ast_node_type":"variable","tokens":[{"end":85,"kind":"keyword","start":0,"text":"let"}]}
        let func_ref = self.module.declare_func_in_func(func_id, &mut self.bcx.func);
        let func_id = self.module.declare_function(name, Linkage::Import, &sig).unwrap();
        let call_inst = self.bcx.ins().call(func_ref, args);