private boolean validate(final Object result) {
        if (!(result instanceof AsyncContextAccessor)) {
            if (isDebug) {
                logger.debug("Invalid result object. Need metadata accessor({}).", AsyncContextAccessor.class.getName());
            }
            return false;
        }

        return true;
    }
TraceRunnable.asyncEntry(Runnable);
<p>TraceCallable.asyncEntry(Callable);
agent-module/plugins/agentsdk-async/src/main/java/com/navercorp/pinpoint/plugin/sdk/interceptor/AsyncEntryInterceptor.java