Illuminate\Database\Eloquent\Builder::firstOr PHP Method

    public function firstOr($columns = ['*'], Closure $callback = null)
    {
        if ($columns instanceof Closure) {
            $callback = $columns;
            $columns = ['*'];
        }
        if (!is_null($model = $this->first($columns))) {
            return $model;
        }
        return call_user_func($callback);
    }