span>( <span class="type-var">'a</span>, unit, string, <a href="#type-registered_stmt">registered_stmt</a> )</span> <span class="xref-unresolved">Base</span>.format4</span> <span class="arrow">&#45;&gt;</span></span>
  <span class="type-var">'a</span></span></code></div><div class="spec-doc"><p>Return a function unit -&gt; Sqlite3.stmt that can be called (once the DB has been initialized) to get the prepared statement corresponding to the current DB connection. Use this to prepare statements only once per D