code: private void justifyRows(final int from, final int to) {
  		// Sometimes the DefaultTableModel is subclassed
  		// instead of the AbstractTableModel by mistake.
  		// Set the number of rows for the case when getRowCount
  		// is overridden.
  		this.dataVector.setSize(getRowCount());
  
  		for (int i = from; i < to; i++) {
  			if (this.dataVector.elementAt(i) == null) {
  				this.dataVector.setElementAt(new Vector(), i);
  			}
  			// ((Vector)dataVector.elementAt(i)).setSize(getColumnCount());
  		}
  	}
docs: Justify rows.
  
  @param from the from
  @param to   the to