/src/main/java/net/finmath/montecarlo/automaticdifferentiation/backward/RandomVariableDifferentiableAAD.java
derivative = zero.mult( Y) ;
derivative = X.mult ( Y ) ;
case ACCRUE: if(differentialIndex == 0) { derivative = Y.mult(Z).add(1.0); } else if(differentialIndex == 1) { derivative = X.mult(Z); } else { <extra_id_0> } break; case DISCOUNT: if(differentialIndex == 0) { derivative = Y.mult(Z).add(1.0).invert(); } else if(differentialIndex == 1) {