title: Setting column style in FlexTable
body: <p>I'm new to GWT and trying to understand it, but have encountered with a problem. When I try to add column style to the specified column in the table </p>
  
  <pre><code>table.getColumnFormatter().addStyleName(column, "columnStyle");
  </code></pre>
  
  <p>it doesn't take effect, but when I apply this style to each cell in the column</p>
  
  <pre><code>table.getCellFormatter().addStyleName(row, column, "columnStyle");
  </code></pre>
  
  <p>it works fine. Why I can not apply the style to the whole column?</p>