docs: def get_CrossCatClient(client_type, **kwargs):
      """Helper which instantiates the appropriate Engine and returns a Client"""
      client = None
  
      if client_type == 'local':
          import crosscat.LocalEngine as LocalEngine
          le = LocalEngine.LocalEngine(**kwargs)
          client = CrossCatClient(le)
  
      elif client_type == 'multiprocessing':
          import crosscat.MultiprocessingEngine as MultiprocessingEngine
          me =  MultiprocessingEngine.MultiprocessingEngine(**kwargs)
          client = CrossCatClient(me)
  
      else:
          raise Exception('unknown client_type: %s' % client_type)
  
      return client