@Override
		protected List<GTreeNode> generateChildren() {
			List<GTreeNode> list = new ArrayList<>();
			for (StackTraceElement te : exc.getStackTrace()) {
				list.add(new ReportStackFrameNode(te));
			}
			return list;
		}
This spacer addresses the optical impression that the message panel changes size when showing details
Ghidra/Framework/Docking/src/main/java/docking/ErrLogExpandableDialog.java