code: public static int lastIndexOf(final String input, final char delim) {
          return input == null ? -1 : lastIndexOf(input, delim, input.length());
      }
docs: Gets the last index of a character ignoring characters that have been escaped
  
  @param input The string to be searched
  @param delim The character to be found
  @return The index of the found character or -1 if the character wasn't found