/**
  * Set additional cashflow based on input
  *
  * @param array $IN new cashflow features
  * @return NULL
  *
  * @access private
  */
 private function add_cashflow_from_input($IN)
 {
     $cf = new CT1_Cashflow();
     if ($cf->set_from_input($IN)) {
         $this->obj->add_cashflow($cf);
     }
     return;
 }