@NotNull
    private String getAppliersAndRemoversLogString(IndexedFile indexedFile) {
      return "Scanner has updated file " + indexedFile.getFileName() +
             " with appliers: " + appliers +
             " and removers: " + removers + "; ";
    }
@NotNull
    private String getAppliersAndRemoversLogString(IndexedFile indexedFile)