my view code is,
$this->widget(‘ext.groupgridview.GroupGridView’, array(
'id' => 'grid1',
'dataProvider' => $dataProvider,
'extraRowColumns' => "hi",
'extraRowExpression' => '"<b style=\"font-size: 3em; color: green\">ff</b>"',
'columns'=>$columns,
));
it shows the following error
"Alias "ext.groupgridview.GroupGridView" is invalid. "
reference : http://groupgridview.demopage.ru/index.php?r=site/extrarow
help me to solve this