protected Procedure<Env>[] doExecute(Env env) throws InterruptedException {
    try {
      updateTimestamp();
      return execute(env);
    } finally {
      updateTimestamp();
    }
  }
Internal method called by the ProcedureExecutor that starts the user-level code execute().

@param env execute environment
@return sub procedures
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/Procedure.java