code: protected void setMetaTypeService(ServiceReference<MetaTypeService> ref) {
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())
              Tr.debug(tc, "setMetaTypeService", ref);
          metaTypeServiceRef.setReference(ref);
      }
docs: Declarative Services method for setting the MetaTypeService service reference.
  
  @param ref reference to the service