src/FACTFinder/Data/Campaign.php
public function addFeedback(array $feedback)
    {
        foreach($feedback as $label => $text)
            $this->feedback[$label] = (string)$text;
    }
public function addFeedback(array $feedback)
    {
        foreach($feedback as $label => $text)
            $this->feedback[$label] = (string)$text;
    }
In case of a collision of keys, the existing feedback string will be
overwritten.

@param string[]