### Question:
CommonNerTokenTransformers { public static TokenTransformer getEnglishVowelsTransformer() { return englishVowelsTransformer; }  static TokenTransformer getLowerCaseTransformer(); static TokenTransformer getMorphologyUpperLowerNumberTransformer(); static TokenTransformer getMorphologyUpperLowerNumberNonContiguousTransformer(); static TokenTransformer getMorphologyContiguousNumbersGroupedOrRejectedTransformer(); static TokenTransformer getEnglishVowelsTransformer();  }### Answer:
@Test public void testEnglishVowelsTransformer() { TokenTransformer transformer = CommonNerTokenTransformers.getEnglishVowelsTransformer(); assertEquals("", transformer.transform("")); assertEquals("*iau", transformer.transform("miau")); assertEquals("****", transformer.transform("GnRH")); assertEquals("**", transformer.transform("s2")); assertEquals("******o*", transformer.transform("rp47phox")); assertEquals("U***", transformer.transform("U937")); assertEquals("U****", transformer.transform("U23k9")); assertEquals("*", transformer.transform(".")); }