EntityPropertyValueCollection::getGroups

public function getGroups(bool $refreshData = false)
{
	$result = [];

	/** @var EntityPropertyValue $propertyValue */
	foreach ($this->collection as $propertyValue)
	{
		$property = $propertyValue->getPropertyObject();
		$group = $property->getGroupInfo($refreshData);
		if (!isset($result[$group['ID']]))
		{
			$result[$group['ID']] = $group;
		}
	}

	return $result;
}