public ServerBuilder blockingTaskExecutor(BlockingTaskExecutor blockingTaskExecutor,
                                              boolean shutdownOnStop) {
        requireNonNull(blockingTaskExecutor, "blockingTaskExecutor");
        virtualHostTemplate.blockingTaskExecutor(blockingTaskExecutor, shutdownOnStop);
        return this;
    }
Sets the {@link BlockingTaskExecutor} dedicated to the execution of blocking tasks or invocations.
If not set, {@linkplain CommonPools#blockingTaskExecutor() the common pool} is used.

@param shutdownOnStop whether to shut down the {@link BlockingTaskExecutor} when the
                      {@link Server} stops
core/src/main/java/com/linecorp/armeria/server/ServerBuilder.java