Q.Apache Flink :如何在initializeState期间获取当前密钥

public class MyOperator implements CheckpointedFunction {
    private transient ListState<Integer> state;

    @Override
    public void initializeState(FunctionInitializationContext context) throws Exception {
        StateTtlConfig ttlConfig = StateTtlConfig
                .newBuilder(Time.minutes(10))
                .setUpdateType(StateTtlConfig.UpdateType.OnReadAndWrite)
                .setStateVisibility(StateTtlConfig.StateVisibility.NeverReturnExpired)
                .build();

        ListStateDescriptor<Integer> descriptor = new ListStateDescriptor<>("myState", Integer.class);
        descriptor.enableTimeToLive(ttlConfig);

        state = context.getOperatorStateStore().getListState(descriptor);

        Iterable<Integer> previousState = state.get();
        // 获取之前保存的状态，从中获取当前密钥
        if (previousState != null) {
            for (Integer key : previousState) {
                // 处理密钥逻辑
            }
        }
    }

    // 其他方法和逻辑...
}