default ContextAwareScheduledExecutorService makeContextAware(ScheduledExecutorService executor) {
        return ContextAwareScheduledExecutorService.of(this, executor);
    }
Returns a {@link ContextAwareScheduledExecutorService} that will execute callbacks in the given
{@code executor}, making sure to propagate this {@link RequestContext} into the callback execution.
If this executor service will be used for callbacks from several requests, use
{@link #makeContextPropagating(ScheduledExecutorService)} instead.
core/src/main/java/com/linecorp/armeria/common/RequestContext.java