text: public Note call() throws GitAPIException {checkCallable();try (RevWalk walk = new RevWalk(repo);ObjectInserter inserter = repo.newObjectInserter()) {NoteMap map = NoteMap.newEmptyMap();RevCommit notesCommit = null;Ref ref = repo.exactRef(notesRef);if (ref != null) {notesCommit = walk.parseCommit(ref.getObjectId());map = NoteMap.read(walk.getObjectReader(), notesCommit);}map.set(id, null, inserter);AddNoteCommand.commitNoteMap(repo, notesRef, walk, map, notesCommit,inserter,"Notes removed by 'git notes remove'"); return map.getNote(id);} catch (IOException e) {throw new JGitInternalException(e.getMessage(), e);}}