code: public GoogleEntry moveEntry(GoogleEntry entry, GoogleCalendar from, GoogleCalendar to) throws IOException {
          dao.events().move(from.getId(), entry.getId(), to.getId()).execute();
          return entry;
      }
docs: Moves an entry from one calendar to another.
  
  @param entry The entry to be moved.
  @param from The current calendar.
  @param to The future calendar.
  @return The entry updated.
  @throws IOException For unexpected errors.