### Question:
InserterUtils { public static <V> boolean isBusinessNullValue(V val) { if (val == null) { return true; } return val instanceof String && Strings.isBlank((String) val); }  static boolean isBusinessNullValue(V val);  }### Answer:
@Test public void isBusinessNullValue() { assertTrue(InserterUtils.isBusinessNullValue(null)); assertFalse(InserterUtils.isBusinessNullValue(1)); assertTrue(InserterUtils.isBusinessNullValue(anyString())); assertFalse(InserterUtils.isBusinessNullValue(anyString())); }