@Override
			public void mouseClicked(MouseEvent e) {
				super.mouseClicked(e);
				Point point = e.getPoint();
				GTreeNode clickedNode = archiveGTree.getNodeForLocation(point.x, point.y);
				lastClickedNode = clickedNode;
			}
This creates all the actions for opening/creating data type archives.
It also creates the action for refreshing the built-in data types
from the class path.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/datamgr/DataTypesProvider.java