WPP

Updated ItemInstance structure for 11.0.0 #840

Job	Run time
build (ubuntu-latest, Debug)	1m 28s
build (ubuntu-latest, Release)	1m 17s
build (windows-latest, Debug)	3m 1s
build (windows-latest, Release)	2m 42s
build (macos-14, Debug)	1m 36s
build (macos-14, Release)	1m 16s
	11m 20s

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