• Registering a multibinded component in an UI scope (e.g. admicentral scope) results into:

   1) No implementation for info.magnolia.ui.framework.layout.field.FieldDescriptionProducer$Definition annotated with info.magnolia.ui.framework.ioc.AdmincentralImpl@3aa25edc was bound.

This can be workarounded with:

info.magnolia.objectfactory.guice.GuiceComponentConfigurationModule#addMultiBinding
-        multiBinder.addBinding().to(key);
+        multiBinder.addBinding().to(key.getTypeLiteral());

This allow usage both main and admincentral scopes.

Usage of other scopes is still not possible though, defining a multibinding e.g. in the app-pages-app scope results into

Caused by: info.magnolia.objectfactory.MgnlInstantiationException: Failed to resolve param [0] of type [interface java.util.Set]

in both admicentral and app scopes ("destroys working multibinded component for admicentral as well".