protected boolean isSelectionImmutable() {
		List<FunctionTagRowObject> items = filterPanel.getSelectedItems();
		return items.stream().anyMatch(row -> row.isImmutable());
	}
Returns true if at least one of the selected items in the list
is immutable (a temporary non-user-defined tag that can't be edited/deleted).
 
@return true if list contains an immutable tag
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/function/tags/TagListPanel.java