/src/main/java/net/finmath/montecarlo/automaticdifferentiation/backward/RandomVariableDifferentiableAAD.java
derivative = X.invert( ) ;derivative = Y.sub( Z) ;
derivative = Y.sub ( Z ) ;
break; case CHOOSE: if(differentialIndex == 0) { switch(factory.getDiracDeltaApproximationMethod()) { case ONE: { <extra_id_0> break; } case ZERO: { derivative = zero; break;