</li><li><tt>Iterator2 = <a href="#type-iterator">iterator</a>(B)</tt></li><li><tt>Iterator3 = <a href="#type-iterator">iterator</a>(C)</tt></li><li><tt>Iterator4 = <a href="#type-iterator">iterator</a>(A | B | C)</tt></li></ul></p>
<p> </p>
</div><p><p>
  Returns the sorted iterator formed by merging <code>Iterator1</code>,
  <code>Iterator2</code>, and <code>Iterator3</code>.  All of <code>Iterator1</code>, <code>Iterator2</code>, and
  <code>Iterator3</code> must be sorted before evaluating this function