default R in(Iterable<? extends V> values) {
    Objects.requireNonNull(values, "values");
    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(Operators.IN, e, Expressions.constant(ImmutableList.copyOf(values))));
  }
Equivalent to {@code this in $values}
criteria/common/src/org/immutables/criteria/matcher/ObjectMatcher.java