PublishableProxy (GRIP API)

```
@Target(TYPE)
@Retention(RUNTIME)
public @interface PublishableProxy
```
Marks a class as being a publishable proxy for a non-publishable type, like BooleanPublishable for Boolean. This annotation only has an affect when placed on a public, concrete, top-level class that implements Publishable.

- Required Element Summary
  
  Required Elements
  Modifier and Type Required Element Description
  
  java.lang.Class[] value
  The type(s) that the marked class is an publishable version of.

- Element Detail
  - value
```
java.lang.Class[] value
```
    The type(s) that the marked class is an publishable version of. The marked class must have a copy constructor for each type.
    These types should use boxed classes instead of primitive types (e.g. Integer.class instead of int.class).