public function __construct(Repository $config)
{
$this->config = $config;
$this->SEARCH_PROPERTY_KEY = $this->config->get('ranger::ranger.std_search.search_property_key');
$this->SEARCH_OPERATOR_KEY = $this->config->get('ranger::ranger.std_search.search_operator_key');
$this->SEARCH_VALUE_KEY = $this->config->get('ranger::ranger.std_search.search_value_key');
}