$this->getOutput()->addHTML(
Html::openElement( 'table', [ 'class' => 'mw-datatable sortable',
'id' => 'mw-trackingcategories-table' ] ) . "\n" .
$this->getOutput()->addHTML(
Html::openElement( 'table', [ 'class' => 'mw-datatable sortable',
'id' => 'mw-trackingcategories-table' ] ) . "\n" .