VersionPress\Storages\MetaEntityStorage::exists PHP Method

    public function exists($vpId, $parentId)
    {
        $parentExists = $this->parentStorage->exists($parentId, null);
        if (!$parentExists) {
            return false;
        }
        return (bool) $this->getJoinedKeyByVpId($this->parentStorage->loadEntity($parentId, null), $vpId);
    }