### Question:
Objects { public static boolean isNotNull(Object value) { return !isNull(value); }  static boolean isNull(Object value); static boolean isNotNull(Object value); static UnaryPredicate<Object> whereNull(); static UnaryPredicate<Object> whereNotNull(); static Mapper<Object, String> toStringValue(); static Mapper<T, String> toStringValueFor(@SuppressWarnings("unused") Class<T> targetClass);  }### Answer:
@Test public void returnsTrueIfSuppliedObjectIsNotNull() { assertThat(isNotNull(new Object()), is(true)); }
@Test public void returnsFalseIfSuppliedObjectIsNull() { assertThat(isNotNull(null), is(false)); }