import java.util.List;
import java.util.Map;
import java.util.Set;
import org.exoplatform.calendar.model.AbstractModel;
import org.exoplatform.calendar.service.Attachment;
<BUG>import org.exoplatform.calendar.service.Calendar;</BUG>
import org.exoplatform.calendar.service.CalendarSetting;
<BUG>import org.exoplatform.calendar.service.CalendarType;</BUG>
import org.exoplatform.calendar.service.Invitation;
import org.exoplatform.calendar.service.Reminder;

import java.util.List;
import java.util.Map;
import java.util.Set;
import org.exoplatform.calendar.model.AbstractModel;
import org.exoplatform.calendar.service.Attachment;
import org.exoplatform.calendar.service.CalendarSetting;
import org.exoplatform.calendar.service.Invitation;
import org.exoplatform.calendar.service.Reminder;
