code: public function only($keys, bool $trim = true, bool $clean = true)
      {
          $values = [];
          foreach ((array) $keys as $key) {
              $values[$key] = $this->get($key, null, $trim, $clean);
          }
  
          return $values;
      }
docs: Get a subset of the items from the input data.
  
  @param string|string[] $keys
  @param bool            $trim
  @param bool            $clean
  
  @return array