Building a .jar with IsSerializable

So here's the problem, and the solution I came up with. My question
is: Is this a valid solution, or is it going to bite my in the tush
later?

I'm building a jar file, using Eclipse, that includes some classes
that implement IsSerializable. So when I tried to use the jar, I got
a ClassNotDef exception. I thought about having them implement
Serializable, but I'd prefer not to have to futz with the whitelist
file. So instead I created a project called "GWT Fill in", and
declared an interface of IsSerializable in the appropriate package.
This compiles and runs successfully.

Is there some hidden problem I'm going to see later?

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.