src/Controller/Component/SetupComponent.php
public function clearCache($type = null) {
		$config = $type ?: 'default';
		Cache::clear(false, $config);

		return true;
	}
public function clearCache($type = null) {
		$config = $type ?: 'default';
		Cache::clear(false, $config);

		return true;
	}
public function clearCache ( $ type = null ) { $ config = $ type ? : 'default' ; Cache :: clear ( false , $ config ) ; return true ; }
Clear cache of tmp folders

@param string|null $type
@return bool Success
Clear cache of tmp folders