<map id="Graphical Class Hierarchy" name="Graphical Class Hierarchy">
<area shape="rect" id="node1" href="$class_reference_holder.html" title="a templated class to manage a reference count of an object that can throw a Qore&#45;language exception w..." alt="" coords="5,31,173,57"/>
<area shape="rect" id="node2" href="$class_private_data_ref_holder.html" title="convenience class for holding AbstractPrivateData references " alt="" coords="231,5,432,32"/>
<area shape="rect" id="node3" href="$class_try_private_data_ref_holder.html" title="convenience class for holding AbstractPrivateData references " alt="" coords="221,56,441,83"/>
</map>
