code: public static void swap(char[] charArray1, char[] charArray2, int index) {
          TrivialSwap.swap(charArray1, index, charArray2, index);
      }
docs: Swap the elements of two char arrays at the same position
  
  @param charArray1 one of the arrays that will have one of its values swapped.
  @param charArray2 the other array that will have one of its values swapped.
  @param index the index of the arrays that will have their values swapped.