code: func (call *CancelDefaultRichMenuCall) Do() (*BasicResponse, error) {
  	res, err := call.c.delete(call.ctx, APIEndpointDefaultRichMenu)
  	if err != nil {
  		return nil, err
  	}
  	defer closeResponse(res)
  	return decodeToBasicResponse(res)
  }
docs: // Do method