code: public static CharSequence join(Iterable<CharSequence> list) {
          // final CharSequence delimiter = Resources.getSystem().getText(R.string.list_delimeter);
          CharSequence delimiter = ",";
          return join(delimiter, list);
      }
docs: Returns list of multiple {@link CharSequence} joined into a single
  {@link CharSequence} separated by localized delimiter such as ", ".
  
  @hide