@Override
    public boolean has(TensorAddress address) {
        try {
            long index = toValueIndex(address, dimensionSizes, type);
            if (index < 0) return false;
            return (index < size());
        } catch (IllegalArgumentException e) {
            return false;
        }
    }
Returns the value at this address, or 0.0 if there is no value at this address
vespajlib/src/main/java/com/yahoo/tensor/IndexedTensor.java