original_string: public function addSubscriber($groupId, $subscriberData = [], $params = [])
      {
          $endpoint = $this->endpoint . '/' . $groupId . '/subscribers';
  
          $response = $this->restClient->post($endpoint, $subscriberData);
  
          return $response['body'];
      }
code: public function addSubscriber($groupId, $subscriberData = [], $params = [])
      {
          $endpoint = $this->endpoint . '/' . $groupId . '/subscribers';
  
          $response = $this->restClient->post($endpoint, $subscriberData);
  
          return $response['body'];
      }
code_tokens: public function addSubscriber ( $ groupId , $ subscriberData = [ ] , $ params = [ ] ) { $ endpoint = $ this -> endpoint . '/' . $ groupId . '/subscribers' ; $ response = $ this -> restClient -> post ( $ endpoint , $ subscriberData ) ; return $ response [ 'body' ] ; }
docstring: Add single subscriber to group
  
  @param int   $groupId
  @param array $subscriberData
  @param array $params
  @return [type]
docstring_tokens: Add single subscriber to group