GsUpgrader >> configurationVersionReportOn: logic error (MNU)

[rjsargent]

GsUpgrader >> configurationVersionReportOn: gets a MessageNotUnderstood error in the following:

((Object allSubclasses
select: [ :cl |
cl isMeta not
and: [ cl isMetacelloConfig and: [ cl name asString beginsWith: 'ConfigurationOf' ] ] ])

There is no general implementation of #isMetacelloConfig for all classes. This results in:

a MessageNotUnderstood occurred (error 2010), a Association class does not understand #'isMetacelloConfig'
Association happens to be the first subclass of Object, in this case.