docs: def restoreDataSet( settings, key, dataSet ):
      """
      Restores the dataset settings to the inputed data set for the given key.
      
      :param      settings | <QSettings>
                  key      | <str>
                  dataSet  | <projex.dataset.DataSet>
      """
      for datakey in dataSet.keys():
          vtype = unwrapVariant(settings.value('%s/%s/type' % (key, datakey)))
          value = unwrapVariant(settings.value('%s/%s/value' % (key, datakey)))
          
          if ( vtype is None ):
              continue
          
          vtype = nativestring(vtype)
          
          if ( vtype in _dataValueTypes ):
              datavalue = _dataValueTypes[vtype][1](value)
          else:
              logger.warning('Could not restore %s' % vtype)
              continue
          
          if ( type(datavalue).__name__ == 'QString' ):
              datavalue = unicode(datavalue)
          
          dataSet.setValue(datakey, datavalue)