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{ "relations": [ { "root": { "input": { "extensionLeaf": { "detail": { "typeUrl": "type.googleapis.com/example.ParquetScanConfig", "value": "ChJkYXRhL3NhbGVzLnBhcnF1ZXQQgBA=" } } }, "names": [ "customer_id", "amount" ] } } ] }