code: public void setRows(int rows) {
  
          m_defaultRows = rows;
          double height_scroll = (rows * 17.95) + 8;
          m_textArea.setVisibleLines(rows);
          m_textAreaContainer.setHeight(height_scroll + "px");
          m_textAreaContainer.setDefaultHeight(height_scroll);
          m_textAreaContainer.onResizeDescendant();
      }
docs: Sets the height of this textarea.<p>
  
  @param rows the value of rows should be shown