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<area shape="poly" id="edge4_Node000001_Node000005" title=" " alt="" coords="194,184,241,223,238,227,190,188"/>
<area shape="rect" id="Node000002" href="$classStrat_1_1UnitRef.html" title="Reference data for a stratigraphic unit." alt="" coords="115,79,217,104"/>
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<area shape="rect" id="Node000003" href="$classCallBacker.html" title="Inherit from this class to be able to send and/or receive CallBacks." alt="" coords="123,5,209,31"/>
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<area shape="rect" id="Node000006" href="$classStrat_1_1RefTree.html" title="Tree of UnitRef&#39;s" alt="" coords="203,299,307,324"/>
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