Classes for handling data structures/sources<br/>
The following data types/hierarchy is supported:
<ul>
 <li>Linear ({@link anychart.data.Set} and {@link anychart.data.Mapping})</li>
 <li>Tree ({@link anychart.data.Tree})</li>
</ul>
You can map any of these data sets to ({@link anychart.data.View}), and then
work with it using {@link anychart.data.Iterator} iterator.