@Override
			public void mouseMoved(MouseEvent e) {
				popupMouseEvent = e;

				// this clears out the current last popup shown so that the user can 
				// move off and on a node to re-show the popup
				savePopupTarget(e);

				// make sure the popup gets triggered eventually
				popupTimer.restart();
			}
The tooltip info used when showing the popup
Ghidra/Framework/Graph/src/main/java/ghidra/graph/viewer/popup/PopupRegulator.java