code: private void newBlock(String m)
      {
          if (row==null)
              newRow();
          else
              row.unnest();
          row.nest(cell=new Block(m));
  
          if (cellNestFactory!=null)
              cell.nest(cellNestFactory.newComposite());  
      }
docs: /* Create a new Cell in the current row.
  Adds to the table after this call and before next call to newRow,
  newCell or newHeader are added to the cell.