OffBroadwayRedisStream.RedisClient.create_group

You're seeing just the callback create_group, go back to OffBroadwayRedisStream.RedisClient module for more information.
Link to this callback

create_group(offset, config)

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Specs

create_group(offset :: String.t(), config :: keyword()) ::
  :ok
  | {:error, OffBroadwayRedisStream.RedisClient.ConnectionError.t()}
  | {:error, any()}