} );
addColumn( openColumn,
InboxConstants.INSTANCE.open() );
Column<InboxPageRow, ComparableImageResource> formatColumn = new Column<InboxPageRow, ComparableImageResource>( new ComparableImageResourceCell() ) {
public ComparableImageResource getValue( InboxPageRow row ) {
return new ComparableImageResource( row.getFormat(),
new Image( ImageResources.INSTANCE.fileIcon() ) );
}