public INDArray prod(INDArray x, INDArray dimensions, boolean keepDims) {
    NDValidation.validateNumerical("prod", "x", x);
    NDValidation.validateInteger("prod", "dimensions", dimensions);
    return Nd4j.exec(new org.nd4j.linalg.api.ops.impl.reduce.same.Prod(x, dimensions, keepDims));
  }