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https://mraddon.blog/2016/03/24/new-custom-listener-to-set-duedate-of-original-ticket-with-2-days-less-in-the-tickets-linked-in-jira-with-groovy-scriptrunner/
New custom Listener to set DueDate of original ticket with 2 Days less in the tickets linked in JIRA with Groovy ScriptRunner