code: protected void unsetConfigAdmin(ServiceReference<ConfigurationAdmin> ref) {
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())
              Tr.debug(tc, "unsetConfigAdmin", ref);
          configAdminRef.unsetReference(ref);
      }
docs: Declarative Services method for unsetting the ConfigurationAdmin service reference.
  
  @param ref reference to the service