code: @Reference(name = "messageEndpointCollaborator",
                 service = MessageEndpointCollaborator.class,
                 cardinality = ReferenceCardinality.OPTIONAL,
                 policy = ReferencePolicy.DYNAMIC,
                 policyOption = ReferencePolicyOption.GREEDY)
      protected void setMessageEndpointCollaborator(ServiceReference<MessageEndpointCollaborator> reference) {
          messageEndpointCollaboratorRef.setReference(reference);
      }
docs: Sets the MessageEndpointCollaborator reference.
  
  @param reference The MessageEndpointCollaborator reference to set.