public static boolean isPrimitiveNumber(Class clazz) {
        return clazz.isPrimitive() && !clazz.equals(boolean.class);
    }
@Test
    public void testIsPrimitiveNumber() {
        assertTrue(FluxBuilder.isPrimitiveNumber(int.class));
        assertFalse(FluxBuilder.isPrimitiveNumber(boolean.class));
        assertFalse(FluxBuilder.isPrimitiveNumber(String.class));
    }