>>> import FeatureServer.DataSource
  >>> dir(FeatureServer.DataSource)
  ['DataSource', 'Lock', '__builtins__', '__doc__', '__file__', '__name__', '__path__', 'os', 'sys', 'time', 'warnings']
  
  >>> import FeatureServer.DataSource.DBM
  >>> dir(FeatureServer.DataSource.DBM)
  ['Action', 'DBM', 'DataSource', 'Lock', 'Pickle', 'Recno', 'UserDict', '__builtins__', '__doc__', '__file__', '__name__', 'anydbm']

  >>> import FeatureServer.DataSource.WFS
  >>> dir(FeatureServer.DataSource.WFS)
  ['DataSource', 'Feature', 'OGR', 'WFS', '__builtins__', '__doc__', '__file__', '__name__', 'os', 'tempfile', 'urllib']