protected function build(IMetaModelDataDefinition $container)
    {
        $this->inputScreen = $this->viewCombination->getScreen($container->getName());

        // Check if we have a BackendViewDef.
        if ($container->hasDefinition(Contao2BackendViewDefinitionInterface::NAME)) {
            /** @var Contao2BackendViewDefinitionInterface $view */
            $view = $container->getDefinition(Contao2BackendViewDefinitionInterface::NAME);
        } else {
            return;
        }

        // Get the panel layout.
        $panelLayout = $this->inputScreen['meta']['panelLayout'];

        // Check if we have a layout.
        if (empty($panelLayout)) {
            return;
        }

        // Get the layout from the dca.
        $arrRows = StringUtil::trimsplit(';', $panelLayout);

        // Create a new panel container.
        $panel     = $view->getPanelLayout();
        $panelRows = $panel->getRows();

        foreach ($arrRows as $rowNo => $rowElements) {
            // Get the row, if we have one or create a new one.
            if ($panelRows->getRowCount() < ($rowNo + 1)) {
                $panelRow = $panelRows->addRow();
            } else {
                $panelRow = $panelRows->getRow($rowNo);
            }

            // Get the fields.
            $fields = StringUtil::trimsplit(',', $rowElements);
            $fields = array_reverse($fields);

            $this->parsePanelRow($fields, $panelRow);

            // If we have no entries for this row, remove it.
            if ($panelRow->getCount() == 0) {
                $panelRows->deleteRow($rowNo);
            }
        }

        $this->ensureSubmitElement($panelRows);
        $this->inputScreen = null;
    }