/** * Prepares layout * * @return \Magento\Framework\View\Element\AbstractBlock */ protected function _prepareLayout() { $this->getToolbar()->addChild('save_button', 'Magento\\Backend\\Block\\Widget\\Button', ['label' => __('Save Currency Symbols'), 'class' => 'save primary save-currency-symbols', 'data_attribute' => ['mage-init' => ['button' => ['event' => 'save', 'target' => '#currency-symbols-form']]]]); return parent::_prepareLayout(); }