HDDS-2126. Ozone 0.4.1 branch build issue. (#1438)

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/impl/ContainerData.java

@@ -544,4 +544,9 @@ public abstract class ContainerData {
    * @return Protocol Buffer Message
    */
   public abstract ContainerProtos.ContainerDataProto getProtoBufMessage();
+
+  /**
+   * Returns the blockCommitSequenceId.
+   */
+  public abstract long getBlockCommitSequenceId();
 }