A marker type whose name is used in the interface attribute of a reference element in a component description to indicate that the type of the service for a reference is not specified and can thus be any service type.

When specifying this marker type in the interface attribute of a reference element in a component description:

• The service type of the reference member or parameter must be java.lang.Object so that any service object can be provided.
• The target attribute of the reference element must be specified to constrain the target services.

For example:

@Reference(service = AnyService.class, target = "(osgi.jakartars.extension=true)")
List<Object> extensions;