code: private void initLevel0FactoryTokens() {
          put("ROOT", "Root", AbstractGedObjectFactory.ROOT_FACTORY);
          put("HEAD", "Header", AbstractGedObjectFactory.HEAD_FACTORY);
          put("FAM", "Family", AbstractGedObjectFactory.FAMILY_FACTORY);
          put("INDI", "Person", AbstractGedObjectFactory.PERSON_FACTORY);
          put("NOTE", "Note", AbstractGedObjectFactory.NOTE_FACTORY);
          put("OBJE", "Multimedia", AbstractGedObjectFactory.MULTIMEDIA_FACTORY);
          put("SOUR", "Source", AbstractGedObjectFactory.SOURCE_FACTORY);
          put("SUBM", "Submitter", AbstractGedObjectFactory.SUBMITTER_FACTORY);
          put("SUBN", "Submission", AbstractGedObjectFactory.SUBMISSION_FACTORY);
          put("TRLR", "Trailer", AbstractGedObjectFactory.TRAILER_FACTORY);
      }
docs: Method to initialize the tokens for top level items.