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gh-131798: Constant-fold `_CONTAINS_OP_DICT` for frozendict #251216

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gh-131798: Constant-fold `_CONTAINS_OP_DICT` for frozendict

gh-131798: Constant-fold `_CONTAINS_OP_DICT` for frozendict #251216

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gh-131798: Constant-fold _CONTAINS_OP_DICT for frozendict #251216

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gh-131798: Constant-fold `_CONTAINS_OP_DICT` for frozendict #251216