src/Factory/IndexFilter.php
public function getOption($iOptionIndex)
    {
        return array_key_exists($iOptionIndex, $this->aOptions) ? $this->aOptions[$iOptionIndex] : null;
    }
public function getOption($iOptionIndex)
    {
        return array_key_exists($iOptionIndex, $this->aOptions) ? $this->aOptions[$iOptionIndex] : null;
    }
Returns a specific option

@param integer $iOptionIndex the option index to return

@return mixed|null