Piwik\DataTable\Row::setColumns PHP Method

    public function setColumns($columns)
    {
        $this->exchangeArray($columns);
    }

 public function test_SumRow_shouldIgnoreCallableValues_AndNotRaiseAnyException()
 {
     $columns = array('nb_visits' => 5, 'label' => 'Test', 'closure' => function () {
         return 7;
     });
     $this->row->setColumns($columns);
     $secondRow = new Row(array(Row::COLUMNS => $columns));
     $this->row->sumRow($secondRow);
     $this->assertEquals(10, $this->row->getColumn('nb_visits'));
     $this->assertEquals(7, $this->row->getColumn('closure'));
 }