src/main/java/com/github/fge/grappa/parsers/BaseParser.java
@DontLabel
    public Rule string(final String string)
    {
        Objects.requireNonNull(string);
        return string(string.toCharArray());
    }
@DontLabel
    public Rule string(final String string)
    {
        Objects.requireNonNull(string);
        return string(string.toCharArray());
    }
Match a string literal

@param string the string to match
@return a rule