@ConstantFunction(name = "multiply", argTypes = {DOUBLE, DOUBLE}, returnType = DOUBLE)
    public static ConstantOperator multiplyDouble(ConstantOperator first, ConstantOperator second) {
        return ConstantOperator.createDouble(first.getDouble() * second.getDouble());
    }
@Test
    public void multiplyDouble() {
        assertEquals(10000.0,
                ScalarOperatorFunctions.multiplyDouble(O_DOUBLE_100, O_DOUBLE_100).getDouble(), 1);
    }