code: protected void setSsl(ServiceReference<Object> reference) {
          sslConfigurationRef.setReference(reference);
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
              Tr.debug(this, tc, "sslRef set to " + reference.getProperty(CONFIG_DISPLAY_ID));
          }
      }
docs: Declarative Services method for setting the SSL Support service reference
  
  @param ref reference to the service