protected boolean isOverEdge(MouseEvent e) {
		VisualizationViewer<V, E> viewer = getViewer(e);
		E edge = JgtUtils.getEdge(e, viewer);
		if (edge == null) {
			return false;
		}

		return !isOverVertex(e);
	}
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