*9003* Introduce new hooks TemplateManager::fetch and FileManager::deleteFile

Would then something like this be OK:
if ($this->fileExists($filePath)) {
 if (!HookRegistry::call('FileManager::deleteFile', array($filePath))) {
	return unlink($filePath);
 } 
}
return false;

I.e. if the hook call prevent the unlink function, false should be returned?