protected function get_labels() {
		$results = [];

		foreach ( $this->get_post_types() as $post_type ) {
			if ( post_type_exists( $post_type ) ) {
				$post_type_object    = get_post_type_object( $post_type );
				$results[$post_type] = $post_type_object->labels->menu_name;
			}
		}

		return $results;
	}