yanghua commented on issue #6548: [FLINK-10132] Incremental cleanup of local expired state with TTL dis… URL: https://github.com/apache/flink/pull/6548#issuecomment-412767916 checkstyle errors : ``` 16:40:29.994 [ERROR] src/main/java/org/apache/flink/runtime/state/ttl/AbstractTtlState.java:[21,8] (imports) UnusedImports: Unused import: org.apache.flink.api.common.state.StateTtlConfig. 16:40:29.994 [ERROR] src/main/java/org/apache/flink/runtime/state/ttl/TtlAggregatingState.java:[21,8] (imports) UnusedImports: Unused import: org.apache.flink.api.common.state.StateTtlConfig. 16:40:29.994 [ERROR] src/main/java/org/apache/flink/runtime/state/ttl/TtlAggregatingState.java:[22,8] (imports) UnusedImports: Unused import: org.apache.flink.api.common.typeutils.TypeSerializer. 16:40:29.994 [ERROR] src/main/java/org/apache/flink/runtime/state/ttl/TtlFoldingState.java:[22,8] (imports) UnusedImports: Unused import: org.apache.flink.api.common.state.StateTtlConfig. 16:40:29.994 [ERROR] src/main/java/org/apache/flink/runtime/state/ttl/TtlFoldingState.java:[23,8] (imports) UnusedImports: Unused import: org.apache.flink.api.common.typeutils.TypeSerializer. ```
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