public function loadHelper($name, $namespace = NULL) {
        $helper_class = ($namespace ? $namespace : 'PowerOn\Helper\\') . Inflector::classify($name) . 'Helper';
        if ( !class_exists($helper_class) ) {
            throw new \Exception(sprintf('No se encuentra la clase(%s), debe configurar correctamente su autoloader', $helper_class));
        }
        
        $this->_container[$name] = function($c) use ($helper_class) {
            return new $helper_class($c);
        };
    }