Dynamically set a created issues priority from a header

Here the related issue value is set to a TemplateIssue should the email be a reply and refer (or indirectly refer) to an existing issue. The example only sets the priority on create.

if (relatedIssue)
{
 print('not updating an existing issue: '+relatedIssue.getKey());
}
else
{
 print('no relatedIssue found, creating an issue, checking for custom priority via header');
 var priority = message.getHeader("X-Priority");
 if (priority)
 {
    print('found priority[0] : '+priority[0]);
    if (priority[0]=="3")
    {
        var targetPrio='blocker';
        print('\nSetting jira specific priority : '+targetPrio);
        resultMap.put('priority', targetPrio);
    }
 }
}