/**
* clear method
*
* API DIFFERENCE
* if a topKey is specified, delete everything under setting-dir/topKey
*
* @param bool $check false
* @return void
* @access public
*/
public function clear($topKey = false)
{
if (MiCache::$setting === null) {
MiCache::config();
}
if ($topKey) {
unset(MiCache::$_appSettingCache['_' . $topKey]);
} else {
MiCache::$_appSettingCache = array();
}
Cache::clear($topKey, MiCache::$setting);
}