public
functions that you want users of your module to be able to use. All
top level functions defined via <code class="mendoza-code">defn</code>, macros defined via
<code class="mendoza-code">defmacro</code>, constants defined via <code class="mendoza-code">def</code>, and vars defined
via <code class="mendoza-code">var</code> will be exported in your module. To mark a function or
binding as private to your module, you may use <code class="mendoza-code">defn-</code> or
<code class="mendoza-code">def-</code