protected void installCursor(Cursor newCursor, MouseEvent e) {
		VisualizationViewer<V, E> viewer = getViewer(e);
		viewer.setCursor(newCursor);
	}
Returns true if the location of the mouse event is over a edge
@param e the event
@return true if the location of the mouse event is over a edge
Ghidra/Features/GraphServices/src/main/java/ghidra/graph/visualization/mouse/AbstractJgtGraphMousePlugin.java