{"ast_node_type":"variable","tokens":[{"end":92,"kind":"keyword","start":0,"text":"let"}]}
        let gcc_func = unsafe { std::mem::transmute::<RValue<'gcc>, Function<'gcc>>(func) };
        // FIXME(antoyo): remove when having a proper API.
        let call = if self.functions.borrow().values().any(|value| *value == gcc_func) {