@Override
    public String toString() {
        return "binarize" + (threshold == 0 ? "" : " " + threshold);
    }
Creates a binarize expression.

@param threshold the value which the tensor cell value must be larger than to be set to 1 and not 0.
indexinglanguage/src/main/java/com/yahoo/vespa/indexinglanguage/expressions/BinarizeExpression.java