docs: @Override
      protected synchronized void includeBaseLocation(String baseLocation) {
          _locations.add(baseLocation);
  
          // only do the processing if the cache has been read.
          if (_cacheRead) {
              File[] files = new File(_installDir, baseLocation).listFiles(new FileFilter() {
                  @Override
                  public boolean accept(File arg0) {
                      // select files only if they end .jar and they aren't in the cache already.
                      return arg0.getName().endsWith(".jar") && !!!_bundleLocations.contains(arg0);
                  }
              });
  
              if (files != null) {
                  for (File f : files) {
                      BundleInfo bInfo;
                      try {
                          bInfo = new BundleInfo(f, baseLocation);
                          if (bInfo.symbolicName != null) {
                              _dirty = true;
                              addToCache(bInfo);
                          }
                      } catch (IOException e) {
                      }
                  }
              }
          }
      }