private List<StoreFileScanner> createFileScanners(Collection<HStoreFile> filesToCompact,
    long smallestReadPoint, boolean useDropBehind) throws IOException {
    return StoreFileScanner.getScannersForCompaction(filesToCompact, useDropBehind,
      smallestReadPoint);
  }
Creates file scanners for compaction.
@param filesToCompact Files.
@return Scanners.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/Compactor.java