515dbc8ec" title="The guts of the ostream &lt;&lt; Code operation: outputs, e.g., Code::S_INVALID_ARGUMENT =&gt; &quot;INVALID_ARGUME...">Category::code_symbol()</a>. This string must be identical to the symbol, minus the <code>S_</code>; e.g., <a class="el" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297ac416e988563e44bf15fc6a81743eef53" title="User called an API with 1 or more arguments against the API spec.">Code::S_INVALID_ARGUMENT</a> =&gt; <code>"INVALID_ARGUMENT". This