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    Problem report 
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    Resolution: Unresolved
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    Major 
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    None
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    None
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    None
PagerDuty doens't handle params.event_source to 4 (Service actions)
branch: master
line: 99
if ([0, 1, 2, 3].indexOf(parseInt(params.event_source)) === -1) { throw 'Incorrect "event_source" parameter given: "' + params.event_source + '".\nMust be 0-3.'; }
It would be nice that PagerDuty Media type could handle Service actions.