public function limitBy(?int $limit, int $offset = null): self
	{
		$this->dirty();
		$this->limit = $limit || $offset ? [$limit, $offset] : null;
		return $this;
	}
public function limitBy(?int $limit, int $offset = null): self
	{
		$this->dirty();
		$this->limit = $limit || $offset ? [$limit, $offset] : null;
		return $this;
	}
Sets LIMIT and OFFSET clause.