private void assertPopupShowing(boolean showing) {
		boolean isShowing = swing(() -> viewer.isPopupShowing());
		assertEquals(showing, isShowing);
	}
Finds a point which intersects the given edge and does not intersect any vertex.

@param e the edge
@return the point
Ghidra/Framework/Graph/src/test.slow/java/ghidra/graph/viewer/GraphViewerTest.java