protected function get_default_args() {

		$args = array(
			'post_id'    => null,
			'subscriber' => null,
			'sort'       => array(
				'updated' => 'DESC',
				'id'      => 'DESC',
			),
			'statuses'   => array(),
			'triggers'   => array(),
			'types'      => array(),
			'user_id'    => null,
		);

		$args = wp_parse_args( $args, parent::get_default_args() );

		return apply_filters( $this->get_filter( 'default_args' ), $args );

	}