public function logFeature(string $class, string $method, array $args) : void
    {
        if (!isset($this->logged[$class])) {
            $this->logged[$class] = [];
        }
        if (!isset($this->logged[$class][$method])) {
            $this->logged[$class][$method] = [];
        }
        if (!in_array($args, $this->logged[$class][$method])) {
            $this->logged[$class][$method][] = $args;
        }
    }