check

add get_or_init for hashmap #4285

Job	Run time
license-header-check	4s
build (ubuntu-latest)	1m 50s
coverage-check	15s
build (macos-latest)	1m 12s
typo-check	3s
build (macos-13)	1m 57s
build (windows-latest)	1m 14s
bleeding-check (macos-latest)	1m 51s
nightly-check (ubuntu-latest)	1m 50s
bleeding-check (ubuntu-latest)	1m 46s
nightly-check (macos-latest)	1m 16s
nightly-check (macos-13)	2m 27s
nightly-check (windows-latest)	1m 18s
	17m 3s

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