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Zack Galbreath authored
Add a test for the new column tree functionality of vtkTreeHeatmapItem. This commit also updates the test for vtkTanglegramItem. The appearance of this item has changed now that column labels are included in the values returned by GetBounds(). Change-Id: I36b8383533d9c61db81e47df278d34577d6ddbeb
8c716e6d