original_string: public function addAttachment(Zend_Mime_Part $attachment)
      {
          $this->addPart($attachment);
          $this->hasAttachments = true;
  
          return $this;
      }
code: public function addAttachment(Zend_Mime_Part $attachment)
      {
          $this->addPart($attachment);
          $this->hasAttachments = true;
  
          return $this;
      }
code_tokens: public function addAttachment ( Zend_Mime_Part $ attachment ) { $ this -> addPart ( $ attachment ) ; $ this -> hasAttachments = true ; return $ this ; }
docstring: Adds an existing attachment to the mail message
  
  @param  Zend_Mime_Part $attachment
  @return Zend_Mail Provides fluent interface
docstring_tokens: Adds an existing attachment to the mail message