</code>.</td></tr>
<tr><td valign="top"><a href="#flatten-2">flatten/2</a></td><td>
  Returns a flattened version of <code>DeepIterator</code> with tail <code>Tail</code>
  appended.</td></tr>
<tr><td valign="top"><a href="#foldl-3">foldl/3</a></td><td>
  Calls <code>Fun(Elem, AccIn)</code> on successive elements <code>A</code> of <code>Iterator</code>,
  starting with <code>AccIn</code> == <code>Acc0</code>.</td></tr>
<tr><td valign="top"><a href="#foldr-3">foldr/3</a></td><td>
  Like <code>foldl/3</code>,