(relationship.getStartTime() < endTime) && (relationship.getEndTime() > startTime));
(time >= relationship.getStartTime()) && (time < relationship.getEndTime()));
      public boolean execute(Object obj) {        Relationship relationship = (Relationship)obj;        return ((schedule.getOtherRole(relationship).equals(role)) &&                (relationship.getStartTime() < endTime) &&                (relationship.getEndTime() > startTime));      }