public TributacaoIbpt(ITributavel tributavel, IIbpt ibpt)
 {
     _tributavel = tributavel;
     _ibpt       = ibpt;
 }
 public IResultadoCalculoIbpt CalculaIbpt(IIbpt ibpt)
 {
     return(new TributacaoIbpt(_tributavel, ibpt).Calcula());
 }