code: func NewRegisterFilteredBlockEvent(eventch chan<- *fab.FilteredBlockEvent, respch chan<- fab.Registration, errCh chan<- error) *RegisterFilteredBlockEvent {
  	return &RegisterFilteredBlockEvent{
  		Reg:           &FilteredBlockReg{Eventch: eventch},
  		RegisterEvent: NewRegisterEvent(respch, errCh),
  	}
  }
docs: // NewRegisterFilteredBlockEvent creates a new RegisterFilterBlockEvent