ng>stl</strong></span> semantics of erasure in contrast
          to <code class="computeroutput"><span class="identifier">subtract</span></code> and <code class="computeroutput"><span class="keyword">operator</span> <span class="special">-=</span></code>,
          that implement a generalized subtraction, that performs inverse aggregations
          if key values collide or key intervals overlap.
        </p>
<p>
          Using iterators it is possible to erase objects or ranges of objects the
          