Documentation for DetachedMockFactory #3399

Job	Run time
build-and-verify (ubuntu-latest, 2.5, 8)	4m 34s
build-and-verify (ubuntu-latest, 2.5, 11)	2m 47s
build-and-verify (ubuntu-latest, 3.0, 8)	4m 27s
build-and-verify (ubuntu-latest, 3.0, 11)	2m 44s
build-and-verify (ubuntu-latest, 3.0, 17)	2m 37s
build-and-verify (ubuntu-latest, 3.0, 21)	2m 22s
build-and-verify (ubuntu-latest, 4.0, 8)	6m 14s
build-and-verify (ubuntu-latest, 4.0, 11)	2m 40s
build-and-verify (ubuntu-latest, 4.0, 17)	2m 36s
build-and-verify (ubuntu-latest, 4.0, 21)	2m 37s
build-and-verify (windows-latest, 2.5, 8)	4m 22s
build-and-verify (windows-latest, 3.0, 8)	4m 14s
build-and-verify (windows-latest, 4.0, 8)	3m 55s
build-and-verify (macos-latest, 2.5, 8)	3m 32s
build-and-verify (macos-latest, 3.0, 8)	3m 36s
build-and-verify (macos-latest, 4.0, 8)	7m 17s
	1h 0m 34s

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