@Override
    public void setStreamListener(StreamAnnotationListener listener) throws ModuleStartException {
        this.streamAnnotationListener = listener;
    }
OAL Runtime is the class generation engine, which load the generated classes from OAL scrip definitions. This runtime
is loaded dynamically.
oap-server/oal-rt/src/main/java/org/apache/skywalking/oal/rt/OALKernel.java