check

Add parts of methods for Char. #4801

Job	Run time
coverage-check	15s
bleeding-check (macos-latest)	1m 25s
license-header-check	7s
bleeding-check (ubuntu-latest)	2m 2s
build (ubuntu-latest)	2m 30s
build (macos-latest)	1m 51s
moon-json-format-check	3s
build (macos-13)	3m 41s
nightly-check (ubuntu-latest)	2m 2s
build (windows-latest)	1m 37s
typo-check	5s
nightly-check (macos-latest)	1m 18s
nightly-check (macos-13)	4m 17s
nightly-check (windows-latest)	1m 36s
	22m 49s

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