code: @Deprecated
      public final void reset(char[] chars)
      {
          int length = 0;
          
          if (chars != null) {
              length = chars.length;
          }
          
          reset(chars, 0, length);
      }
docs: Reset the iterator to iterate over the characters
  in <code>chars</code>. This allows clients to reuse an iterator.
  
  @param chars the new array of characters over which to iterate.
  
  @deprecated This API is ICU internal only.
  @hide draft / provisional / internal are hidden on Android