s
        several predefined policy implementations for each of the policy types as
        described above. First we will describe those predefined types. Afterwards
        we will give some guidelines how you can write your own policy implementations.
      </p>
<h5>
<a name="spirit.support.multi_pass.h3"></a>
        <span class="phrase"><a name="spirit.support.multi_pass.predefined_policies"></a></span><a class="link" href="multi_pass.html#spirit.support.multi_pass.predefined_policies">Predefined
     