/**
*
* Get the size of the object-cache in bytes.
*
* @param string $backend
* @return int
*/
private function getCacheSize($backend = 'file')
{
$size = 0;
if ($backend === 'file') {
if ($files = Cacheable::get_cache_files()) {
foreach ($files as $file) {
$size += $file->Size;
}
}
return $size;
}
return 'Not available.';
}