GWT ListEditor implementing HasEditorErrors
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I have this ListEditor that takes care of editing the licenses for a Customer. In my `CustomerEditor`, thie `LicensesEditor` is bound to path licenses, which is of type `List<License>>`.

> Customer (1)--> (many) Licenses (java.util.List<License>)

Now, the validation rules state that at least one license per Customer is required. The constraint violations work perfectly. But how do I implement HasEditorErrors<T> for a ListEditor ...  I want to provide my own error marking.

**What type do I inject for the generic parameter T of HasEditorErrors < T >** ??

The signature for the ListEditor is as follows ...

> public class LicensesEditor extends Composite implements
> IsEditor<ListEditor<License, LicenseInListEditor>>

I tried to implement `HasEditorErrors<List<License>>` which gives at runtime the error :

> [DEBUG] [klawtapp] - Descending into licenses
> [ERROR] [klawtapp] - Could not find a getter for path  editor in proxy type java.util.List



Keeping a question mark in HasEditorErrors<?> as implemented interface gives compile time error :

> The type LicensesEditor cannot extend or implement HasEditorErrors<?>.
> A supertype may not specify any wildcard	LicensesEditor.java

Anybody ?