How can I incorporate the "Create Another" checkbox into a ScriptRunner Behaviour?

[Jordan Klein]

I've written the script below to set my Create Screen default Form Value for Assignee to a user called Unconfirmed (for a specific issuetype).

I'd like it to run for the first issue created, but to save the user's chosen Assignee option for the next issue if the user has the "Create Another" box checked.

How can I incorporate the "Create Another" checkbox into my script so it only runs before the first issue is created?

import com.atlassian.jira.component.ComponentAccessor

import static com.atlassian.jira.issue.IssueFieldConstants.*

if (getActionName() != "Create Issue") {
 return 
}

getFieldById(ASSIGNEE).setFormValue("Unconfirmed")