    functions are made from the same implicit or explicit strand.
                    For example, if the <code class="computeroutput"><span class="identifier">io_context</span></code>
                    associated with a <code class="computeroutput"><span class="identifier">beast</span><span class="special">::</span><span class="identifier">websocket</span><span class="special">::</span><span class="identifier">stream</span></code>
                    is single threaded, this counts as an implicit strand 