default Tensor xwPlusB(Tensor w, Tensor b, String dimension) {
        return new XwPlusB<>(new ConstantTensor<>(this), new ConstantTensor<>(w), new ConstantTensor<>(b), dimension).evaluate();
    }
Aggregates cells over a set of dimensions, or over all dimensions if no dimensions are specified
vespajlib/src/main/java/com/yahoo/tensor/Tensor.java