code: public static URI build(String repoUri, String namespace, String dataset) {
      return build(URI.create(repoUri), namespace, dataset);
    }
docs: Builds a dataset URI from the given repository URI string, namespace, and
  dataset name.
  
  @param repoUri a repository URI string
  @param namespace a String namespace
  @param dataset a String dataset name
  @return a dataset URI for the namespace and dataset name in the repository
  
  @since 0.17.0