Max number of messages to retrieve in a pull.
If set, the number of milliseconds to wait for the number of messages specified in batch
If set, the max number of bytes to receive. The server will limit the number of messages in the batch to fit within this setting.
If true, the request for messages will end when received by the server
Options for a JetStream pull subscription which define how long the pull request will remain open and limits the amount of data that the server could return.