code: public boolean deleteDatasetFromId(String projectId, String datasetName) {
      // [START bigquery_delete_dataset]
      DatasetId datasetId = DatasetId.of(projectId, datasetName);
      boolean deleted = bigquery.delete(datasetId, DatasetDeleteOption.deleteContents());
      if (deleted) {
        // the dataset was deleted
      } else {
        // the dataset was not found
      }
      // [END bigquery_delete_dataset]
      return deleted;
    }
docs: [VARIABLE "my_dataset_name"]