Bug 343406 Trim stacks stay invisible in other perspectives even when rendered children are under it
1. Minimize the 'Outline' view's stack. 2. Window > Open Perspective > Debug 3. Activate the 'Debug' view. 4. Ctrl+M 5. There is minimized stuff in the left trim but the right trim is completely empty.
bundles/org.eclipse.e4.ui.workbench.addons.swt/src/org/eclipse/e4/ui/workbench/addons/minmax/MinMaxAddon.java
ctf.setMinimized(false);
				ctf.setMaximizeVisible(true);
				ctf.setMaximized(false);
			}
			
			
			if (element instanceof MArea && ctf == element.getWidget()) {
				List<MPartStack> stacks = modelService.findElements(element, null,
						MPartStack.class, null);
				for (MPartStack stack : stacks) {
					adjustCTFButtons(stack);
				}
			}
		}
	}
	private CTabFolder getCTFFor(MUIElement element) {
		if (element instanceof MArea) {
			if (element.getWidget() instanceof CTabFolder)
				return (CTabFolder) element.getWidget();
			MUIElement theKid = ((MArea) element).getChildren().get(0);
			if (theKid.getWidget() instanceof CTabFolder)
				return (CTabFolder) theKid.getWidget();
		} else if (element.getWidget() instanceof CTabFolder)
			return (CTabFolder) element.getWidget();
		else if (element instanceof MPlaceholder) {
			MPlaceholder ph = (MPlaceholder) element;
			if (ph.getRef() instanceof MArea) {
				return getCTFFor(ph.getRef());
			}
		}