long getSizeOfStoreFiles(TableName tn, Set<StoreFileReference> storeFileNames) {
    return storeFileNames.stream()
      .collect(Collectors.summingLong((sfr) -> getSizeOfStoreFile(tn, sfr)));
  }
Computes the size of each store file in {@code storeFileNames}
hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/FileArchiverNotifierImpl.java