code: public int addText (Object text, int colSpan, String... styles)
      {
          int row = getRowCount();
          setText(row, 0, text, colSpan, styles);
          return row;
      }
docs: Adds text to the bottom row of this table in column zero, with the specified column span and
  style.
  
  @param text an object whose string value will be displayed.
  
  @return the row to which the text was added.