marc-leopold/cms/plugins/rainlab/builder/widgets/defaultcontroldesigntimeprovider/partials/_control-repeater.htm

<div class="builder-blueprint-control-repeater-body">
    <?php
        $prompt = $this->getPropertyValue($properties, 'prompt');
        if (!strlen($prompt)) {
            $prompt = 'rainlab.builder::lang.form.property_prompt_default';
        }
    ?>
    <div class="repeater-button"><span data-localization-key="<?= e($prompt) ?>" data-plugin="<?= e($formBuilder->getPluginCode()) ?>"><?= e(trans($prompt)) ?></span></div>
</div>