private void processPatternLetter(int letter, int repetitions) {
        finishLiterals();
        visitor.visitTokenLetter(letter, repetitions);
    }
Creates a new pattern read for processing the given string.
@param sequence String with the pattern to process.
@param visitor Visitor to call for each encountered token of the pattern.
primefaces/src/main/java/org/primefaces/convert/PatternReader.java