### Question:
ByteArrayExtractors { static boolean isWildcard(String columnQualifierExpression) { return columnQualifierExpression.endsWith("*"); }  static ByteArrayExtractor getExtractor(String fieldValueExpression, ValueSource valueSource);  }### Answer:
@Test public void testIsWildcard_True() { assertTrue(ByteArrayExtractors.isWildcard("qualifi*")); }
@Test public void testIsWildcard_False() { assertFalse(ByteArrayExtractors.isWildcard("qualifier")); }