lib/MultiIniModifier.php
public function getSectionList()
    {
        $list = array_merge($this->master->getSectionList(), $this->overrider->getSectionList());
        return array_unique($list);
    }
public function getSectionList()
    {
        $list = array_merge($this->master->getSectionList(), $this->overrider->getSectionList());
        return array_unique($list);
    }
return the list of section names.

@return array