code: @Reference(service = ComponentMetaDataDecorator.class, name = "componentMetadataDecorator",
                 cardinality = ReferenceCardinality.MULTIPLE,
                 policy = ReferencePolicy.DYNAMIC)
      protected void setComponentMetadataDecorator(ServiceReference<ComponentMetaDataDecorator> ref) {
          componentMetadataDecoratorRefs.putReference((String) ref.getProperty("component.name"), ref);
      }
docs: Declarative Services method for adding a component metadata decorator.
  
  @param ref reference to the service