lysis phase: lists,
  dictionaries, dates (<code>datetime</code> objects), arbitrary named tuples and arbitrary
  data classes.</li>
<li>the input for <code>@data_function</code> has been tightened to reflect the fact that
  data functions should not take arguments (<code>dds.keep</code> should be used instead).
  Passing arguments now triggers an error.</li>
</ul>
<h2 id="v073">v0.7.3</h2>
<p>Fixes the usage of positional and keyworded arguments when used in conjunction
with <code>dds.keep</code>.</p>
<h2 