>Replace test with another object, either discarding the
  original or aggregating it in the new test.
</ol>

<p>Depending on what the decorator does, it may need to run
ahead of other decorators or after them. Decorators should
be installed using the Install method overload that takes
a priority. The priorities range from 1 to 9 and decorators
with lower priority values are installed first. The following
standard values are defined for use if desired:
<ul>
<li>DecoratorPriority.Default = 0
<li>DecoratorPri