code: @Reference(cardinality = ReferenceCardinality.OPTIONAL,
                 policy = ReferencePolicy.DYNAMIC)
      protected synchronized void setLogService(LogService logService) {
          this.logService = logService;
      }
docs: Bind the OSGi <code>LogService</code> to use for error reporting.
  
  @param logService
  the OSGi <code>LogService</code>