### Question:
HistoryBlockImporter extends BaseBlockImporter<A, SwiftResultSet> { @Override protected void indexIfNeed(SegmentInfo segInfo) throws Exception { SegmentUtils.indexSegmentIfNeed(Collections.singletonList(insertings.get(segInfo).getSegment())); } HistoryBlockImporter(DataSource dataSource, A alloter);   }### Answer:
@Test public void indexIfNeed() { }