code> cannot currently send, until it reaches writable state again.</li>
<li>Other <code>E</code> values indicate the connection is (potentially gracefully) permanently incapable of transmission.</li>
<li><code>E == operation_aborted</code> is not possible.</li>
</ul>
</li>
</ul>
<p >Items are extensively logged on <code>*logger_ptr</code>, and we follow the normal best practices to avoid verbose messages at the severities strictly higher than <code>TRACE</code>. In particular, any error is logged as a <cod