Nextras\Forms\Controls\Fragments\ComponentControlTrait::saveState PHP Method

    public function saveState(array &$params, $reflection = NULL)
    {
        $reflection = $reflection === NULL ? $this->getReflection() : $reflection;
        foreach ($reflection->getPersistentParams() as $name => $meta) {
            if (isset($params[$name])) {
                // injected value
            } elseif (array_key_exists($name, $params)) {
                // NULLs are skipped
                continue;
            } elseif ((!isset($meta['since']) || $this instanceof $meta['since']) && isset($this->{$name})) {
                $params[$name] = $this->{$name};
                // object property value
            } else {
                continue;
                // ignored parameter
            }
            $type = gettype($meta['def']);
            if (!ComponentReflection::convertType($params[$name], $type)) {
                throw new InvalidLinkException(sprintf("Value passed to persistent parameter '%s' in %s must be %s, %s given.", $name, $this instanceof Presenter ? 'presenter ' . $this->getName() : "component '{$this->getUniqueId()}'", $type === 'NULL' ? 'scalar' : $type, is_object($params[$name]) ? get_class($params[$name]) : gettype($params[$name])));
            }
            if ($params[$name] === $meta['def'] || $meta['def'] === NULL && $params[$name] === '') {
                $params[$name] = NULL;
                // value transmit is unnecessary
            }
        }
    }