class SensitivityAndReturnDataBundle {

  public DoubleTimeSeries<?> getReturnTimeSeriesForUnderlying(final UnderlyingType type) {
    Validate.notNull(type, "underlying");
    final DoubleTimeSeries<?> result = _underlyingReturnTS.get(type);
    Validate.notNull(result, "underlying return time series for " + type);
    return result;
  }

  public  SensitivityAndReturnDataBundle(final Sensitivity<?> sensitivity, final double value, final Map<UnderlyingType, DoubleTimeSeries<?>> underlyingReturnTS);

}