public int hashCode() {
   final int prime = 31;
   int result = 1;
   result = prime * result + ((codigo == null) ? 0 : codigo.hashCode());
   result = prime * result + ((eeabVolume == null) ? 0 : eeabVolume.hashCode());
   result = prime * result + ((medidorSaida == null) ? 0 : medidorSaida.hashCode());
   result = prime * result + ((tipomedicao == null) ? 0 : tipomedicao.hashCode());
   result = prime * result + ((valorMedicaoSaida == null) ? 0 : valorMedicaoSaida.hashCode());
   result =
       prime * result + ((valorMedicaoSaidaAux == null) ? 0 : valorMedicaoSaidaAux.hashCode());
   return result;
 }