{"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"self.rwu_table.copy(ln,"}]}
        self.rwu_table.copy(ln, succ_ln);
        self.successors[ln] = Some(succ_ln);
        debug!("init_from_succ(ln={}, succ={})", self.ln_str(ln), self.ln_str(succ_ln));