code: def get_stage_deployers(keys, stack):
      
      config = stack.config
      creds = config[A.DEPLOYER_CREDS]
      deployers = []
      for res_type in keys:
          res_configs = config.get(res_type)
          if not res_configs:
              continue
          log.debug("Found config for resource type, %s" % res_type)
          for res_config in res_configs:
              if A.PROVIDER in res_config:
                  ds = cloud.get_deployers(res_config, res_type, stack, creds)
              else:
                  ds = [default.ServerDeployer(stack, res_config)]
              if ds:
                  deployers.extend(ds)
      return deployers
docs: Returns a list of deployer objects that *create* cloud resources.  Each
      member of the list is responsible for provisioning a single stack resource
      (e.g. a virtual server, a security group, a bucket, etc...).
  
      :param keys:  A list of top-level configuration keys for which to create
          deployers.
      :type keys:  :class:`~collections.Iterable`
  
      :param config:  A stack object.
      :type config:  :class:`~bang.stack.Stack`
  
      :rtype:  :class:`list` of :class:`~bang.deployers.deployer.Deployer`