code: private synchronized void loadStrings(String tzCanonicalID) {
          if (tzCanonicalID == null || tzCanonicalID.length() == 0) {
              return;
          }
          loadTimeZoneNames(tzCanonicalID);
  
          Set<String> mzIDs = getAvailableMetaZoneIDs(tzCanonicalID);
          for (String mzID : mzIDs) {
              loadMetaZoneNames(mzID);
          }
      }
docs: Load all strings used by the specified time zone.
  This is called from the initializer to load default zone's
  strings.
  @param tzCanonicalID the canonical time zone ID