static ContextAwareRunnable of(RequestContext context, Runnable runnable) {
        return new DefaultContextAwareRunnable(context, runnable);
    }
Returns a new {@link ContextAwareRunnable} that sets the specified {@link RequestContext}
before executing an underlying {@link Runnable}.
core/src/main/java/com/linecorp/armeria/common/ContextAwareRunnable.java