default <T, U> BiConsumer<T, U> makeContextAware(BiConsumer<T, U> action) {
        return ContextAwareBiConsumer.of(this, action);
    }
Returns a {@link ContextAwareBiConsumer} that makes sure the current {@link RequestContext} is
set and then invokes the input {@code action}.
core/src/main/java/com/linecorp/armeria/common/RequestContext.java