public function simple_objects() {

		if ( $this->setup_related_objects() || null === self::$names_simple ) {
			$simple_objects = array();

			foreach ( self::$related_objects as $object => $related_object ) {
				if ( ! isset( $related_object['simple'] ) || ! $related_object['simple'] ) {
					continue;
				}

				$simple_objects[] = $object;
			}

			self::$names_simple = (array) apply_filters( 'pods_form_ui_field_pick_simple_objects', $simple_objects );
		}

		return self::$names_simple;

	}