public INDArray cumprod(INDArray in, long... axis) {
    NDValidation.validateNumerical("cumprod", "in", in);
    Preconditions.checkArgument(axis.length >= 1, "axis has incorrect size/length. Expected: axis.length >= 1, got %s", axis.length);
    return Nd4j.exec(new org.nd4j.linalg.api.ops.impl.transforms.custom.CumProd(in, false, false, axis))[0];
  }