40354
13260 inspecting variables in the debugger fails in some cases	https://pharo.fogbugz.com/f/cases/1326014393 CollectionValueHolder>>remove: does not annnounce change	https://pharo.fogbugz.com/f/cases/1439314397 reduce polymorph extension methods	https://pharo.fogbugz.com/f/cases/14397

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