'Yii2 ListView summary unknown property

When I try to run the following code

<?=
ListView::widget([
    'dataProvider' => $dataProvider,
    'itemView' => '_fichaRevista',
    'summary ' => '',
]);
?>

I get this Exception:

Unknown Property – yii\base\UnknownPropertyException

Setting unknown property: yii\widgets\ListView::summary

Why?

According to the documentation summary property is correct. What is going wrong?

listview yii2 summary

Solution 1:^[1]

That is because you have a white-space in the property name summary in the end remove it and it will work or copy paste from below

<?=
ListView::widget([
    'dataProvider' => $dataProvider,
    'itemView' => '_fichaRevista',
    'summary' => '',
]);
?>

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Solution	Source
Solution 1	Muhammad Omer Aslam