#830 の設計を`UserDict`にも (#834) #2884

Job	Run time
shellcheck	19s
actionlint	20s
build-and-test-java-api (windows-latest)	6m 38s
build-and-test-python-api (windows-latest)	8m 32s
build-and-test-java-api (macos-latest)	2m 40s
build-unix-cpp-example (macos-latest, osx-x64-cpu-cpp-shared)	2m 5s
build-and-test-python-api (macos-latest)	3m 23s
build-and-test-java-api (ubuntu-latest)	2m 56s
build-unix-cpp-example (ubuntu-latest, linux-x64-cpu-cpp-shared)	1m 32s
build-and-test-python-api (ubuntu-latest)	3m 2s
build-windows-cpp-example	5m 14s
c-header	46s
rust-integration-test-strategy-matrix	1s
rust-lint	5m 1s
rust-unit-test	3m 16s
validate-cargo-lock	18s
rust-integration-test (macos-12)	2m 21s
rust-integration-test (ubuntu-20.04)	1m 26s
	49m 50s

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