 class="xref-unresolved">Stdlib</span>.Buffer.t <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-config_usage_extra">config_usage_extra</a> <span class="arrow">&#45;&gt;</span></span> unit</span></code></div><div class="spec-doc"><p>Output a JSON value of type <a href="#type-config_usage_extra"><code>config_usage_extra</code></a>.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-string_of_config_usage_extra"><a href="#val-string_of_config_usage_extra" class="anc