code: @Nonnull
    public static String removeMultiple (@Nullable final String sInputString, @Nonnull final char [] aRemoveChars)
    {
      ValueEnforcer.notNull (aRemoveChars, "RemoveChars");
  
      // Any input text?
      if (hasNoText (sInputString))
        return "";
  
      // Anything to remove?
      if (aRemoveChars.length == 0)
        return sInputString;
  
      final StringBuilder aSB = new StringBuilder (sInputString.length ());
      iterateChars (sInputString, cInput -> {
        if (!ArrayHelper.contains (aRemoveChars, cInput))
          aSB.append (cInput);
      });
      return aSB.toString ();
    }
docs: Optimized remove method that removes a set of characters from an input
  string!
  
  @param sInputString
  The input string.
  @param aRemoveChars
  The characters to remove. May not be <code>null</code>.
  @return The version of the string without the passed characters or an empty
  String if the input string was <code>null</code>.