/**
* Get the virtual URL for a thumbnail file or directory
*
* @param bool|string $suffix If not false, the name of a thumbnail file
* @return string
*/
function getThumbVirtualUrl($suffix = false)
{
$this->assertRepoDefined();
$path = $this->repo->getVirtualUrl() . '/thumb/' . $this->getUrlRel();
if ($suffix !== false) {
$path .= '/' . rawurlencode($suffix);
}
return $path;
}