private function init()
{
if (null === $this->statement) {
$this->statement = $this->repository->getHistoryStatement();
}
if ($this->position !== $this->actualPosition) {
$this->current = $this->statement->fetch(\PDO::FETCH_ASSOC, \PDO::FETCH_ORI_ABS, $this->position);
$this->actualPosition = $this->position;
}
}