public static void testIntegralHandling() {
   assertEquals("3", NumericConverterFactory.toIntegral("3"));
   assertEquals("3", NumericConverterFactory.toIntegral("3.0"));
   assertEquals("-3", NumericConverterFactory.toIntegral("-3"));
   assertEquals("-3", NumericConverterFactory.toIntegral("-3.0"));
   assertEquals("3000", NumericConverterFactory.toIntegral("3000.0"));
   assertEquals("3000", NumericConverterFactory.toIntegral("3000,0"));
 }