docs: public boolean filterFile(File file)
      {
          String strName = file.getName();
          if (strName.endsWith("~"))
              return false;
          if (strName.endsWith("#"))
              return false;
          if (strName.startsWith("#"))
              return false;
          if (strName.startsWith("."))
              return false;
          return true;    // Process this.
      }