protected function prepareParams(array $unparsed): void
    {
        $this->relationSearchFields = array_key_exists('rparams', $unparsed) ? $this->parseRelationParameters($unparsed['rparams']) : [];
        $this->customSearchFields = array_key_exists('cparams', $unparsed) ? $this->parseSearchParameters($unparsed['cparams'])['mapped'] : [];
        $this->normalSearchFields = array_key_exists('params', $unparsed) ? $this->parseSearchParameters($unparsed['params'])['mapped'] : [];
    }