Airship\Cabin\Hull\Landing\PublicFiles::isViewable PHP Method

    protected function isViewable(string $mimeHeader) : bool
    {
        $pos = \strpos($mimeHeader, ';');
        if ($pos !== false) {
            $mimeHeader = Util::subString($mimeHeader, 0, $pos);
        }
        return \in_array($mimeHeader, $this->viewableMimeTypes);
    }