protected function guardRequiredState()
{
parent::guardRequiredState();
Assertion::isArray($this->data);
$mandatory_attribute_names = ['identifier', 'uuid', 'language', 'version', 'workflow_state'];
foreach ($mandatory_attribute_names as $attribute_name) {
Assertion::keyExists($this->data, $attribute_name, 'mandatory');
}
}
protected function guardRequiredState()
{
parent::guardRequiredState();
Assertion::isArray($this->data);
}
