Bug 164989 [Viewers] ColumnViewer#getColumnViewerOwner() doesn't respects column count
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TableTreeViewer.java
}
    
    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ColumnViewer#getItemAt(org.eclipse.swt.graphics.Point)
     */
    protected Item getItemAt(Point p) {
    	return getTableTree().getTable().getItem(p);
    }
    /* (non-Javadoc)
     * Method declared on AbstractTreeViewer.
     */
    protected int getItemCount(Control widget) {
        return ((TableTree) widget).getItemCount();
    }
    /* (non-Javadoc)
     * Method declared on AbstractTreeViewer.
     */
    protected int getItemCount(Item item) {
        return ((TableTreeItem) item).getItemCount();
    }
    /* (non-Javadoc)
     * Method declared on AbstractTreeViewer.
     */
    protected org.eclipse.swt.widgets.Item[] getItems(
            org.eclipse.swt.widgets.Item item) {
        return ((TableTreeItem) item).getItems();
    }
    /**
     * The table tree viewer implementation of this <code>Viewer</code> framework
     * method returns the label provider, which in the case of table tree