doitinpoland.com/wp-content/plugins/sitepress-multilingual-cms/menu/post-menus/post-edit-screen/class-wpml-meta-boxes-post-edit-ajax-factory.php

<?php

class WPML_Meta_Boxes_Post_Edit_Ajax_Factory implements IWPML_Backend_Action_Loader, IWPML_AJAX_Action_Loader {

	/**
	 * @return WPML_Meta_Boxes_Post_Edit_Ajax
	 */
	public function create() {
		global $sitepress, $wpml_post_translations;

		$post_edit_metabox = new WPML_Meta_Boxes_Post_Edit_HTML( $sitepress, $wpml_post_translations );
		return new WPML_Meta_Boxes_Post_Edit_Ajax( $post_edit_metabox, wpml_load_core_tm(), new WPML_Admin_Language_Switcher() );
	}
}