Defined in github.com/aws/aws-sdk-go/service/ecs/api.go
The nextToken value returned from a previous paginated ListTaskDefinitionFamilies request where maxResults was used and the results exceeded the value of that parameter. Pagination continues from the end of the previous results that returned the nextToken value. This value is null when there are no more results to return.
This token should be treated as an opaque identifier that is only used
to retrieve the next items in a list and not for other programmatic purposes.