     <p>
        However, if there are other visible corresponding overloads an ambiguity
        could arise. In this case, the user can supply her own rounder policy which
        could, for instance, use a fully qualified call.
      </p>
      <p>
        This technique allows the default rounder policies to be used directly with
        user defined types. The user only requires that suitable overloads of <code class="computeroutput"><span class="identifier">floor</span><span class="special">()</span><