Overrides MultiWidthLayoutBase::getWidthOptions
protected function getWidthOptions() { return [ '25-50-25' => '25%/50%/25%', '33-34-33' => '33%/34%/33%', '25-25-50' => '25%/25%/50%', '50-25-25' => '50%/25%/25%', ]; }