/tt></li></ul></p>
<p> </p>
</div><p><p>
  Returns the sorted iterator formed by merging <code>Iterator1</code> and
  <code>Iterator2</code>. Both <code>Iterator1</code> and <code>Iterator2</code> must be sorted
  according to the ordering function <code>Fun</code> and contain no duplicates
  before evaluating this function. <code>Fun(A, B)</code> is to return <code>true</code> if
  <code>A</code> compares less than or equal to <code>B</code> in the ordering, otherwise
  <code>false</code>. When two element