public void setDerivativeGains(double[] derivativeGains) {
   gains.setDerivativeGains(derivativeGains);
 }
 public void setDerivativeGains(
     double derivativeGainX, double derivativeGainY, double derivativeGainZ) {
   gains.setDerivativeGains(derivativeGainX, derivativeGainY, derivativeGainZ);
 }