providers_ = new TreeMap(); mime_types_ = new HashSet(); io_methods_by_mime_ = new HashMap(); name_mappings_by_mime_ = new HashMap();
stores_by_mime_ = new HashMap(); mappers_by_mime_ = new HashMap(); provider_classes_ = new HashMap();
  public DinomedaTrader()  {    providers_ = new TreeMap();    mime_types_ = new HashSet();    io_methods_by_mime_ = new HashMap();    name_mappings_by_mime_ = new HashMap();  }