LuceneSearch extends SearchService { @Override public void deleteIndexDocs(String noteId) { deleteDoc(noteId, null); } @Inject  LuceneSearch(ZeppelinConfiguration conf); @Override List<Map<String, String>> query(String queryStr); @Override void updateIndexDoc(Note note); @Override void addIndexDocs(Collection<Note> collection); @Override void addIndexDoc(Note note); @Override void deleteIndexDocs(String noteId); @Override void deleteIndexDoc(String noteId, Paragraph p); @Override void close(); @Override void startRebuildIndex(Stream<Note> notes);  }
@Test public void canDeleteNull() throws IOException { noteSearchService.deleteIndexDocs(null); }