public SDVariable leakyReluDerivative(String name, SDVariable x, double alpha) {
    SDValidation.validateNumerical("leakyReluDerivative", "x", x);
    SDVariable out =  new org.nd4j.linalg.api.ops.impl.transforms.gradient.LeakyReLUDerivative(sd,x, alpha).outputVariable();
    return sd.updateVariableNameAndReference(out, name);
  }