soarez commented on code in PR #15690:
URL: https://github.com/apache/kafka/pull/15690#discussion_r1587465657
##########
core/src/main/java/kafka/server/TierStateMachine.java:
##########
@@ -17,15 +17,66 @@
package kafka.server;
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
import java.util.Optional;
Review Comment:
`:core:checkstyleMain` is failing because this import is unused
```
> Task :core:checkstyleMain FAILED
[ant:checkstyle] [ERROR]
(...)/kafka/core/src/main/java/kafka/server/TierStateMachine.java:33:8:
Unused import - java.util.Optional. [UnusedImports]
```
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