Merge pull request #111 from ba-st/110-IdentitySet-and-IdentityBag-re… #457

Job	Run time
Pharo64-9.0 + development	24s
Pharo64-9.0 + dependent-sunit-extensions	14s
Pharo64-9.0 + deployment	23s
Pharo64-9.0 + tests	17s
Pharo64-9.0 + tools	15s
Pharo64-10 + development	19s
Pharo64-10 + dependent-sunit-extensions	18s
Pharo64-10 + deployment	14s
Pharo64-10 + tests	22s
Pharo64-10 + tools	23s
Pharo64-11 + development	21s
Pharo64-11 + dependent-sunit-extensions	14s
Pharo64-11 + deployment	22s
Pharo64-11 + tests	20s
Pharo64-11 + tools	40s
	5m 6s

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