ResolveQuery::add PHP Method

    public function add($key, $val)
    {
        $this->values[$key] = $val;
        return $this;
    }

 /**
  * Resolves and returns resolved entity or null (shortcut method)
  * @param string tableName Table name
  * @param array vars Attributes of entity to be matched in key=>value pairs
  * @return object ResolveResponse
  */
 public function resolve($tableName, $vars)
 {
     $query = new ResolveQuery();
     foreach ($vars as $key => $value) {
         $query->add($key, $value);
     }
     $res = new ResolveResponse($this->request($this->urlForResolve($tableName, $query)));
     return $res;
 }