--- /dev/null
+digraph rw_mo2 {
+margin=0;
+ranksep=.3;
+
+N1 [label="X: v.store(1)", shape=none];
+N2 [label="A: v.load()", shape=none, fontcolor=invis];
+N3 [label="B: v.store(2)", shape=none];
+
+N2 -> N3 [color=invis];
+N1 -> N2 [color=invis, constraint=false];
+N1 -> N3 [label="mo", color="#00aa00", style=dashed, penwidth=3, constraint=false];
+}