public StringMaker before(char ch) {
        int index = indexing.indexOf(ch, begin);

        if (index < 0 || index > end) {
            return this;
        }

        end = index < begin ? begin : index;
        return this;
    }
Before.

@param ch the ch
@return the string maker
agent-module/bootstraps/bootstrap-core/src/main/java/com/navercorp/pinpoint/bootstrap/plugin/jdbc/StringMaker.java