CTDrawing ctDrawing = dr1.getCTDrawing();
// Connector, shapes and text boxes are all two cell anchors
assertEquals(0, ctDrawing.sizeOfAbsoluteAnchorArray());
assertEquals(0, ctDrawing.sizeOfOneCellAnchorArray());
assertEquals(4, ctDrawing.sizeOfTwoCellAnchorArray());
shapes = dr1.getShapes();
assertEquals(4, shapes.size());
assertTrue(shapes.get(0) instanceof XSSFConnector);
assertTrue(shapes.get(1) instanceof XSSFShapeGroup);