</td><td class=PParameter nowrap>item</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote>Adds the given (<i>key</i>, <i>item</i>) pair to the pool.</div></div><div class=CToolTip id="tt8"><div class=CMethod><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td>virtual function int num ()</td></tr></table></blockquote>Returns the number of uniquely keyed items stored in the pool.</div></div><div class=CToolTip id="tt9"><div class=CMethod><blockqu