@type t() :: %Spear.PersistentSubscription.Info.ConnectionInfo{
  available_slots: integer(),
  average_items_per_second: integer(),
  connection_name: String.t(),
  count_since_last_measurement: integer(),
  from: String.t(),
  in_flight_messages: integer(),
  observed_measurements: [
    Spear.PersistentSubscription.Info.ConnectionInfo.Measurement.t()
  ],
  total_items: integer(),
  username: String.t()
}