code: @GwtIncompatible
      public RETokenizer tokenizer(Reader in, int length) throws IOException {
          return new RETokenizer(this, in, length);
      }
docs: Tokenizes a specified region by an occurrences of the pattern.
  Note that a series of adjacent matches are regarded as a single separator.
  The same as new RETokenizer(Pattern,Reader,int);
  
  @see RETokenizer
  @see RETokenizer#RETokenizer(regexodus.Pattern, java.io.Reader, int)