Order::getFields

public function getFields()
{
	$fields = [];

	if(Loader::includeModule('sale'))
	{
		$fields = OrderBase::getAvailableFields();
		$fields['PAYMENTS'] = [
			'ENTITY_TYPE' => ArrayEntity::class,
			'ENTITY_OPTIONS' => [
				'CHILD_ENTITY' => Payment::class,
				'ITEM_NAME' => 'PAYMENT',
			],
		];
	}

	return $fields;
}