Guice multi-binding support introduced in Magnolia 5.4 is a useful mechanism which allows to resolve various configured components of the similar origin as a single set.

To make it even more elegant - we have introduced a @Multibinding annotation which our IoC integration recognises and prepares according bindings.

However, the support for multi-binding so far spans only the case of interface/implementation mappings. If one binds an interface to a javax.inject.Provider or a singleton instance - @Multibinding annotation isn't respected (we simply don't look for it).