text: public Collection<ReflogEntry> call() throws GitAPIException,InvalidRefNameException {checkCallable();try {ReflogReader reader = repo.getReflogReader(ref);if (reader == null)throw new RefNotFoundException(MessageFormat.format(JGitText.get().refNotResolved, ref));return reader.getReverseEntries();} catch (IOException e) {throw new InvalidRefNameException(MessageFormat.format(JGitText.get().cannotRead, ref), e);}}