GlassPanel glassPane = descriptor.getManager().getGlassPanel();
if (previewPanel != null)
glassPane.remove(previewPanel);
previewPanel = new TranslucentPanel(new ExtendedTableLayout(new double[][]{{2, TableLayout.FILL, 2}, {2, TableLayout.FILL, 2}}));
previewPanel.setAlphaModeRatio(representativeAnchorDescriptor.getPreviewTransparentRatio());
setPreviewPanelBounds(rootPaneContainer);
previewPanel.add(contentContainer, "1,1,FULL,FULL");
glassPane.add(previewPanel);