'#consider-top-level-definitions-or-reexports-fixme-needs-rfc'>Consider top-level definitions or reexports. [FIXME: needs RFC]</a></h3>
<p>For modules with submodules,
define or <a href="https://doc.rust-lang.org/std/io/#reexports">reexport</a> commonly used
definitions at the top level:</p>

<ul>
<li>Functionality relevant to the module itself or to many of its
children should be defined in <code>mod.rs</code>.</li>
<li>Functionality specific to a submodule should live in that
submodule. Reexport at the to