public StringMaker afterLast(char ch1, char ch2) {
        int index = lastIndexOf(indexing, end, ch1, ch2);
        if (index < begin) {
            return this;
        }

        begin = index + 1 > end ? end : index + 1;
        return this;
    }
Find last ch1 or ch2
@param ch1
@param ch2
@return
agent-module/bootstraps/bootstrap-core/src/main/java/com/navercorp/pinpoint/bootstrap/plugin/jdbc/StringMaker.java