<?php namespace Dotdigitalgroup\Email\Model\Adminhtml\Source\Contact; class Modified implements \Magento\Framework\Data\OptionSourceInterface { /** * Contact imported options. * * @return array */ public function toOptionArray() { return [ [ 'value' => 'null', 'label' => '', ], [ 'value' => '1', 'label' => 'Modified', ] ]; } }