CheckableVisibilityField::setValue PHP Method

    public function setValue($value, $data = array())
    {
        $this->child->setValue($value);
        if ($this->alwaysVisible) {
            $this->checkbox->setValue(true);
        } elseif (is_array($data)) {
            $this->checkbox->setValue(isset($data['Visible'][$this->name]) && $data['Visible'][$this->name]);
        } else {
            $this->checkbox->setValue(in_array($this->name, $data->getPublicFields()));
        }
        return $this;
    }