Pop\Dom\Child::setNodeValue PHP Method

    public function setNodeValue($value)
    {
        $this->nodeValue = $value;
        return $this;
    }

 /**
  * Constructor
  *
  * Instantiate the set of checkbox input form elements
  *
  * @param  string       $name
  * @param  array        $values
  * @param  string       $indent
  * @param  string|array $marked
  * @return CheckboxSet
  */
 public function __construct($name, array $values, $indent = null, $marked = null)
 {
     if (null !== $marked) {
         if (!is_array($marked)) {
             $marked = [$marked];
         }
     } else {
         $marked = [];
     }
     parent::__construct('fieldset', null, null, false, $indent);
     $this->attributes['class'] = 'checkbox-fieldset';
     $this->setMarked($marked);
     $this->setName($name . '[]');
     // Create the checkbox elements and related span elements.
     $i = null;
     foreach ($values as $k => $v) {
         $checkbox = new Input\Checkbox($name . '[]', null, $indent);
         $checkbox->setAttributes(['class' => 'checkbox', 'id' => $name . $i, 'value' => $k]);
         // Determine if the current radio element is checked.
         if (in_array($k, $this->marked)) {
             $checkbox->setAttribute('checked', 'checked');
         }
         $span = new Child('span', null, null, false, $indent);
         $span->setAttribute('class', 'checkbox-span');
         $span->setNodeValue($v);
         $this->addChildren([$checkbox, $span]);
         $this->checkboxes[] = $checkbox;
         $i++;
     }
     $this->value = $values;
 }