code: public JRecordExtractor<T, DoubleNamedSparseArray>
    extractWithSubsetSettingsDoubleNamedSparseArray(String settings) {
      return new JRecordExtractor<>(
          JavaOps.extractWithSubsetSettingsDoubleNamedSparseArray(self, settings));
    }
docs: Java wrapper for {@link FeatureSpec#extractWithSubsetSettings(String, FeatureBuilder, ClassTag).