text: public override Note Call(){CheckCallable();RevWalk walk = new RevWalk(repo);ObjectInserter inserter = repo.NewObjectInserter();NoteMap map = NoteMap.NewEmptyMap();RevCommit notesCommit = null;try{Ref @ref = repo.GetRef(notesRef);if (@ref != null){notesCommit = walk.ParseCommit(@ref.GetObjectId());map = NoteMap.Read(walk.GetObjectReader(), notesCommit);}map.Set(id, null, inserter);CommitNoteMap(walk, map, notesCommit, inserter, "Notes removed by 'git notes remove'");return map.GetNote(id);}catch (IOException e){throw new JGitInternalException(e.Message, e);}finally{inserter.Release();walk.Release();}}