{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"fmt::Debug::fmt(&self.alloc_id(),"}]}
        fmt::Debug::fmt(&self.alloc_id(), f)?; // propagates `alternate` flag
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        if self.immutable() {