|  | 
            Obtain an executor with the blocking.always
            property.
          
constexpr basic_executor_type< Allocator, unspecified > require( execution::blocking_t::always_t ) const;
            Do not call this function directly. It is intended for use with the
            require
            customisation point.
          
For example:
auto ex1 = my_thread_pool.executor(); auto ex2 = asio::require(ex1, asio::execution::blocking.always);