@Override
    public void setStorageBuilderFactory(final StorageBuilderFactory factory) {
        oalClassGenerator.setStorageBuilderFactory(factory);
    }
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