*     which case the input string is always returned.
   * @param padChar the character to insert at the beginning of the result until the minimum length
   *     is reached
   * @return the padded string
   */
  public static String padStart(String string, int minLength, char padChar) {
    checkNotNull(string); // eager for GWT.
    if (string.length() >= minLength) {
      return string;
    }

    }

    @Override
    public BaseEncoding withPadChar(char padChar) {
      if (8 % alphabet.bitsPerChar == 0
          || (paddingChar != null && paddingChar.charValue() == padChar)) {
        return this;
      } else {
        return newInstance(alphabet, padChar);
      }
    }

    @Override

FB82..FB83    ; mapped                 ; 068D          # 1.1  ARABIC LETTER DDAHAL ISOLATED FORM..ARABIC LETTER DDAHAL FINAL FORM
FB84..FB85    ; mapped                 ; 068C          # 1.1  ARABIC LETTER DAHAL ISOLATED FORM..ARABIC LETTER DAHAL FINAL FORM
FB86..FB87    ; mapped                 ; 068E          # 1.1  ARABIC LETTER DUL ISOLATED FORM..ARABIC LETTER DUL FINAL FORM

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