code: private static String getPluralOpenString(String varName, int offset) {
      StringBuilder openingPartSb = new StringBuilder();
      openingPartSb.append('{').append(varName).append(",plural,");
      if (offset != 0) {
        openingPartSb.append("offset:").append(offset).append(' ');
      }
      return openingPartSb.toString();
    }
docs: Gets the opening (left) string for a plural statement.
  
  @param varName The plural var name.
  @param offset The offset.
  @return the ICU syntax string for the plural opening string.