@SuppressWarnings("unchecked")
    default SpeedmentPredicate<ENTITY> in(V... values) {
        return in(Stream.of(values).collect(toSet()));
    }
Returns a {@link java.util.function.Predicate} that will evaluate to
{@code true}, if and only if this Field is <em>in</em> the set of given
values.
<p>
N.B. if no values are given, then the returned Predicate will always
evaluate to {@code false}

@param values the set of values to match towards this Field
@return a Predicate that will evaluate to {@code true}, if and only if
this Field is <em>in</em> the set of given values
runtime-parent/runtime-field/src/main/java/com/speedment/runtime/field/trait/HasComparableOperators.java