#830 の設計を`UserDict`にも #2883

Job	Run time
actionlint	18s
shellcheck	14s
build-and-test-java-api (windows-latest)	6m 40s
build-and-test-java-api (macos-latest)	3m 1s
build-and-test-java-api (ubuntu-latest)	2m 49s
build-and-test-python-api (windows-latest)	7m 29s
build-and-test-python-api (macos-latest)	3m 26s
build-and-test-python-api (ubuntu-latest)	3m 11s
build-unix-cpp-example (macos-latest, osx-x64-cpu-cpp-shared)	1m 44s
build-unix-cpp-example (ubuntu-latest, linux-x64-cpu-cpp-shared)	1m 39s
build-windows-cpp-example	4m 33s
c-header	47s
rust-integration-test-strategy-matrix	1s
rust-lint	3m 6s
rust-unit-test	4m 12s
validate-cargo-lock	22s
rust-integration-test (macos-12)	2m 47s
rust-integration-test (ubuntu-20.04)	1m 25s
	47m 44s

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