magento2/app/code/Magento/Sales/Model/AbstractModel.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Sales\Model;

use Magento\Framework\Api\AttributeValueFactory;
use Magento\Framework\Model\AbstractExtensibleModel;

/**
 * Sales abstract model
 * Provide date processing functionality
 *
 * @api
 * @SuppressWarnings(PHPMD.NumberOfChildren)
 * @since 100.0.2
 */
abstract class AbstractModel extends AbstractExtensibleModel
{
    /**
     * @param \Magento\Framework\Model\Context $context
     * @param \Magento\Framework\Registry $registry
     * @param \Magento\Framework\Api\ExtensionAttributesFactory $extensionFactory
     * @param AttributeValueFactory $customAttributeFactory
     * @param \Magento\Framework\Model\ResourceModel\AbstractResource $resource
     * @param \Magento\Framework\Data\Collection\AbstractDb $resourceCollection
     * @param array $data
     */
    public function __construct(
        \Magento\Framework\Model\Context $context,
        \Magento\Framework\Registry $registry,
        \Magento\Framework\Api\ExtensionAttributesFactory $extensionFactory,
        AttributeValueFactory $customAttributeFactory,
        \Magento\Framework\Model\ResourceModel\AbstractResource $resource = null,
        \Magento\Framework\Data\Collection\AbstractDb $resourceCollection = null,
        array $data = []
    ) {
        parent::__construct(
            $context,
            $registry,
            $extensionFactory,
            $customAttributeFactory,
            $resource,
            $resourceCollection,
            $data
        );
    }

    /**
     * Returns _eventObject
     *
     * @return string
     */
    public function getEventObject()
    {
        return $this->_eventObject;
    }
}