docs: private void uncacheSystemId(String systemId) {
  
          String key = getCacheKey(systemId, false);
          Object o = OpenCms.getMemoryMonitor().getCachedVfsObject(key);
          OpenCms.getMemoryMonitor().uncacheVfsObject(key);
          if ((null != o) && LOG.isDebugEnabled()) {
              LOG.debug(
                  org.opencms.xml.Messages.get().getBundle().key(
                      org.opencms.xml.Messages.LOG_ERR_UNCACHED_SYS_ID_1,
                      key));
          }
      }