public void convert() throws IOException {
        jfr.stopAtNewChunk = true;
        while (!jfr.eof()) {
            // Reset method dictionary, since new chunk may have different IDs
            methodNames = new Dictionary<>();
            convertChunk();
        }
    }
JFRConverter is copied from one.jfr.JfrConverter. Because need to
add collectMultiEvents and getEventAggregator methods, to parse 
and process multiple events at one time.
oap-server/server-library/library-async-profiler-jfr-parser/src/main/java/one/jfr/JFRConverter.java