EsAddStreamState
Description
Object containing the state used to handle EsStreamController>>addStream:.
Instance State
• addStreamFuture: <EsFutureImpl> returned by call to #addStream:
• addSubscription: <EsStreamSubscription> on stream argument to addStream
Class Methods
    controller:source:cancelOnError:
No comment
 Instance Methods
    cancel
  Stop adding the stream.
     Complete the future returned by EsStreamController>>addStream: when
     the cancel is complete.
     Answers a future if the cancel takes time, otherwise return `nil`.'
     Answers:
        <EsFuture>
 Last modified date: 04/21/2022