3 
<a name="l00024"></a>00024 <span class="keyword">class </span><a class="code" href="classb2_block_allocator.html">b2BlockAllocator</a>;
<a name="l00025"></a>00025 
<a name="l00026"></a><a class="code" href="classb2_polygon_contact.html">00026</a> <span class="keyword">class </span><a class="code" href="classb2_polygon_contact.html">b2PolygonContact</a> : <span class="keyword">public</span> <a class="code" href="classb2_contact.html">b2Contact</a>
<a name="l00027"></a>00027 {
<a name="l00028"></a>00028 <s