 The <acronym class="acronym">UTF</acronym> opted to avoid classed altogether and to use the least intrusive "
  generic callback" approach. The facility, the <acronym class="acronym">UTF</acronym> provides, requires specific function signature and allows
  adopting any function or function object that matches the signature as a test case. The signatures the <acronym class="acronym">UTF</acronym>
  supports are:
 </p>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="itemizedlis