code: @Nonnull
    public static String getHexEncoded (@Nonnull final byte [] aInput)
    {
      ValueEnforcer.notNull (aInput, "Input");
  
      return getHexEncoded (aInput, 0, aInput.length);
    }
docs: Convert a byte array to a hexadecimal encoded string.
  
  @param aInput
  The byte array to be converted to a String. May not be
  <code>null</code>.
  @return The String representation of the byte array.