Isswp101\Persimmon\QueryBuilder\Filters\RangeOrExistFilter::query PHP Method

    public function query($range)
    {
        if ($range === null) {
            $query = ['exists' => ['field' => $this->field]];
        } else {
            $query = ['range' => [$this->field => $range]];
        }
        return $query;
    }