protected long getRemoteReplicaLag(Store store, long totalBytesRead) {
    return store.getSizeInBytes() - totalBytesRead;
  }
Convert StoreKeys based on {@link StoreKeyConverter}
@param storeKeys A list of original storeKeys.
@return A list of converted storeKeys.
ambry-server/src/main/java/com/github/ambry/server/AmbryRequests.java