@Override
    public StringIsEmptyPredicate<ENTITY, D> negate() {
        return new StringIsEmptyPredicate<>(getField());
    }
@param <ENTITY> the entity type
@param <D>      the database type

@author  Emil Forslund
@since   3.0.11
runtime-parent/runtime-field/src/main/java/com/speedment/runtime/field/internal/predicate/string/StringIsNotEmptyPredicate.java