public boolean addSortedExclusive(Annotation annot) {
      Annotation currAnot = null;

      // overlapping check
      for (int i = 0; i < size(); ++i) {
        currAnot = (Annotation) get(i);
        if (annot.overlaps(currAnot)) {
          return false;
        } // if
      } // for

      long annotStart = annot.getStartNode().getOffset().longValue();
      long currStart;
      // insert
      for (int i = 0; i < size(); ++i) {
        currAnot = (Annotation) get(i);
        currStart = currAnot.getStartNode().getOffset().longValue();
        if (annotStart < currStart) {
          insertElementAt(annot, i);
          /*
          Out.prln("Insert start: "+annotStart+" at position: "+i+" size="+size());
          Out.prln("Current start: "+currStart);
          */
          return true;
        } // if
      } // for

      int size = size();
      insertElementAt(annot, size);
      // Out.prln("Insert start: "+annotStart+" at size position: "+size);
      return true;
    } // addSorted