Bug 153943 [Viewers] Rename new API, e.g. RowPart -> ViewerRow
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TreeEditorImpl.java
private CellEditor cellEditor;
    private CellEditor[] cellEditors;
    private ICellModifier cellModifier;
    private String[] columnProperties;
    private Item treeItem;
    private int columnNumber;
    private ICellEditorListener cellEditorListener;