protected function loadMissingRelation(self $models, array $path)
    {
        $relation = array_shift($path);

        $name = explode(':', key($relation))[0];

        if (is_string(reset($relation))) {
            $relation = reset($relation);
        }

        $models->filter(function ($model) use ($name) {
            return ! is_null($model) && ! $model->relationLoaded($name);
        })->load($relation);

        if (empty($path)) {
            return;
        }

        $models = $models->pluck($name);

        if ($models->first() instanceof BaseCollection) {
            $models = $models->collapse();
        }

        $this->loadMissingRelation(new static($models), $path);
    }