Mark deprecated method

sources/qetgraphicsitem/element.cpp

@@ -1322,6 +1322,15 @@ void Element::setElementInformations(DiagramContext dc)
 	emit elementInfoChange(old_info, m_data.m_informations);
 }
 
+/**
+ * @brief Element::elementData
+ * @return the element data used by this element
+ */
+ElementData Element::elementData() const
+{
+	return m_data;
+}
+
 /**
 	@brief comparPos
 	Compare position of the two elements. Compare 3 points: