code: public static void iterateChars (@Nullable final String sInputString, @Nonnull final ICharConsumer aConsumer)
    {
      ValueEnforcer.notNull (aConsumer, "Consumer");
  
      if (sInputString != null)
      {
        final char [] aInput = sInputString.toCharArray ();
        for (final char cInput : aInput)
          aConsumer.accept (cInput);
      }
    }
docs: Iterate all characters and pass them to the provided consumer.
  
  @param sInputString
  Input String to use. May be <code>null</code> or empty.
  @param aConsumer
  The consumer to be used. May not be <code>null</code>.