@Override
			protected void eldestEntryRemoved(Entry<String, DockingAction> eldest) {
				DockingAction action = eldest.getValue();
				if (action == null) {
					return; // this implies we have an entry that no longer exists in the project
				}
				removeRecentAction(action);
			}
Plugin to pop up the dialog to manage data types in the program
and archived data type files. The dialog shows a single tree with
different categories.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/datamgr/DataTypeManagerPlugin.java