Query the current value of the bulk_guarantee property.

static constexpr execution::bulk_guarantee_t query(
    execution::bulk_guarantee_t );

Do not call this function directly. It is intended for use with the query customisation point.

For example:

auto ex = my_thread_pool.executor();
if (boost::asio::query(ex, boost::asio::execution::bulk_guarantee)
      == boost::asio::execution::bulk_guarantee.parallel)
  ...