code: func NewRegisterTxStatusEvent(txID string, eventch chan<- *fab.TxStatusEvent, respch chan<- fab.Registration, errCh chan<- error) *RegisterTxStatusEvent {
  	return &RegisterTxStatusEvent{
  		Reg:           &TxStatusReg{TxID: txID, Eventch: eventch},
  		RegisterEvent: NewRegisterEvent(respch, errCh),
  	}
  }
docs: // NewRegisterTxStatusEvent creates a new RegisterTxStatusEvent