Re: [WARN] In order to produce smaller client-side code, 'Object' is not allowed; consider using a more specific type

[David]

twu question:
1. what difference? 
public interface State {}

and 

 public class State implements Serializable {
         MyType type;
         String string;
         FOO foo;
         BAR bar;
     }

2. what difference between Serializable and IsSerializable?

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