code: func NewMsgGetCFCheckpt(filterType FilterType, stopHash *chainhash.Hash) *MsgGetCFCheckpt {
  	return &MsgGetCFCheckpt{
  		FilterType: filterType,
  		StopHash:   *stopHash,
  	}
  }
docs: // NewMsgGetCFCheckpt returns a new bitcoin getcfcheckpt message that conforms
  // to the Message interface using the passed parameters and defaults for the
  // remaining fields.