protected function isDisplayable(FormEvent $event, $i, $eventName)
    {
        $form = $event->getForm();
        $data = $event->getData();

        if (!isset($data[$i])) {
            return false;
        }

        $item = is_object($data[$i]) ? (array) $data[$i] : $data[$i];

        if (!is_array($item)) {
            return true;
        }

        if (FormEvents::PRE_SUBMIT === $eventName) {
            if (isset($item['__to_remove'])) {
                return !(bool) $item['__to_remove'];
            }
        }

        foreach ($item as $k => $v) {
            if (FormEvents::PRE_SUBMIT === $eventName &&
                HiddenType::class === get_class($form->get($i)->get($k)->getConfig()->getType()->getInnerType())
            ) {
                continue;
            }

            // Value not null
            if (null !== $v && '' !== $v) {
                return true;
            }
        }

        return false;
    }
protected function isDisplayable(FormEvent $event, $i, $eventName)
    {
        $form = $event->getForm();
        $data = $event->getData();

        if (!isset($data[$i])) {
            return false;
        }

        $item = is_object($data[$i]) ? (array) $data[$i] : $data[$i];

        if (!is_array($item)) {
            return true;
        }

        if (FormEvents::PRE_SUBMIT === $eventName) {
            if (isset($item['__to_remove'])) {
                return !(bool) $item['__to_remove'];
            }
        }

        foreach ($item as $k => $v) {
            if (FormEvents::PRE_SUBMIT === $eventName &&
                HiddenType::class === get_class($form->get($i)->get($k)->getConfig()->getType()->getInnerType())
            ) {
                continue;
            }

            // Value not null
            if (null !== $v && '' !== $v) {
                return true;
            }
        }

        return false;
    }
protected function isDisplayable ( FormEvent $ event , $ i , $ eventName ) { $ form = $ event -> getForm ( ) ; $ data = $ event -> getData ( ) ; if ( ! isset ( $ data [ $ i ] ) ) { return false ; } $ item = is_object ( $ data [ $ i ] ) ? ( array ) $ data [ $ i ] : $ data [ $ i ] ; if ( ! is_array ( $ item ) ) { return true ; } if ( FormEvents :: PRE_SUBMIT === $ eventName ) { if ( isset ( $ item [ '__to_remove' ] ) ) { return ! ( bool ) $ item [ '__to_remove' ] ; } } foreach ( $ item as $ k => $ v ) { if ( FormEvents :: PRE_SUBMIT === $ eventName && HiddenType :: class === get_class ( $ form -> get ( $ i ) -> get ( $ k ) -> getConfig ( ) -> getType ( ) -> getInnerType ( ) ) ) { continue ; } // Value not null if ( null !== $ v && '' !== $ v ) { return true ; } } return false ; }
Is displayable.

@param FormEvent $event
@param int       $i
@param string    $eventName

@return bool
Is displayable .