Plum\Plum\Workflow::convertItemValue PHP Method

    protected function convertItemValue($item, ConverterPipe $pipe)
    {
        $value = Vale::get($item, $pipe->getField());
        $filterValue = $pipe->getFilterField() ? Vale::get($item, $pipe->getFilterField()) : $item;
        if ($pipe->getFilter() === null || $pipe->getFilter()->filter($filterValue) === true) {
            $item = Vale::set($item, $pipe->getField(), $pipe->getConverter()->convert($value));
        }
        return $item;
    }