flink-queryable-state/flink-queryable-state-client-java/src/main/java/org/apache/flink/queryablestate/client/VoidNamespaceSerializer.java
flink-runtime/src/main/java/org/apache/flink/runtime/state/VoidNamespaceSerializer.java

flink-queryable-state/flink-queryable-state-client-java/src/main/java/org/apache/flink/queryablestate/client/VoidNamespace.java
flink-runtime/src/main/java/org/apache/flink/runtime/state/VoidNamespace.java

flink-queryable-state/flink-queryable-state-client-java/src/main/java/org/apache/flink/queryablestate/network/NettyBufferPool.java
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/netty/NettyBufferPool.java