n><span 
class="pcrb7t-">&#x00A0;(Ptr</span><span 
class="pcrb7t-">&#x00A0;a))</span><span 
class="pcrb7t-">&#x00A0;-&#x003E;</span><span 
class="pcrb7t-">&#x00A0;Maybe</span><span 
class="pcrb7t-">&#x00A0;a</span><span 
class="pcrb7t-">&#x00A0;-&#x003E;</span><span 
class="pcrb7t-">&#x00A0;IO</span><span 
class="pcrb7t-">&#x00A0;(Ptr</span><span 
class="pcrb7t-">&#x00A0;a) </span></td>
</tr></table>                                                                                   </div> <dd class="haddockd