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