Hi, from Web history I see that it was a Polymorph extension from Gary Chambers: "Added MultistateLabelMorph that can adapt to interaction sates from buttons."
http://forum.world.st/update-1-1-11293-Polymorph-Enhancements-td1680386.html In Pharo5.0 Latest update: #50380 one can see that it is not referenced. Do we still need it or can we move it to deprecated? Thanks T.