Replaces the datasets in a dataset group with the specified datasets.
See https://www.paws-r-sdk.com/docs/forecastservice_update_dataset_group/ for full documentation.
forecastservice_update_dataset_group(DatasetGroupArn, DatasetArns)
[required] The ARN of the dataset group.
[required] An array of the Amazon Resource Names (ARNs) of the datasets to add to the dataset group.