Cloud Storage: getStorageClass in SetStorageClassLifecycleAction is not visible about java-storage HOT 5 CLOSED

package com.google.cloud.storage;

public class StorageClassExtractor {
    public static StorageClass extract(BucketInfo.LifecycleRule.LifecycleAction lifecycleAction) {
        return ((BucketInfo.LifecycleRule.SetStorageClassLifecycleAction)lifecycleAction).getStorageClass();
    }
}

package storage;

import com.google.cloud.storage.BucketInfo;
import com.google.cloud.storage.StorageClass;
import com.google.cloud.storage.StorageClassExtractor;

public class LifecycleActionTest {
    public static void main(String... args) {
        BucketInfo.LifecycleRule.LifecycleAction lifecycleAction =
                BucketInfo.LifecycleRule.LifecycleAction.newSetStorageClassAction(StorageClass.MULTI_REGIONAL);
        if (lifecycleAction.getActionType().equals(BucketInfo.LifecycleRule.SetStorageClassLifecycleAction.TYPE)) {
            System.out.println(StorageClassExtractor.extract(lifecycleAction));
        }

    }
}

public StorageClass extractStorageClass(LifecycleAction lifecycleAction) {
    try {
      Method method = SetStorageClassLifecycleAction.class.getDeclaredMethod("getStorageClass");
      method.setAccessible(true);
      return (StorageClass)method.invoke(lifecycleAction);
    } catch (ReflectiveOperationException e) {
      throw new RuntimeException("Exception while reading storage class from lifecycle rules", e);
    }
  }