public LowIncomeTaxOffsetTaxCalculatorDecorator(IAustraliaDecoratableTaxCalculator calculator)
 {
     _decoratedCalculator = calculator;
 }
 public void Init()
 {
     _decoratedCalculator = new au.IncomeTaxCalculator();
     _decorator           = new au.LowIncomeTaxOffsetTaxCalculatorDecorator(_decoratedCalculator);
 }