add `LOAD` function #130

Job	Run time
build (ubuntu-latest, Debug)	2m 45s
build (ubuntu-latest, Release)	2m 48s
build (windows-latest, Debug)	5m 34s
build (windows-latest, Release)	8m 27s
per-build-publish	5m 51s
nuget-publish	0s
	25m 25s

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