CancelEmailInDowstreamJob

// If list of causes is not empty, then cancel email
// Will NOT sent email notification by Jenkins email-ext plugin when job was executed by another upstream job.
// The idea is to avoid multiple notifications from both upstream and downstream jobs.
try {
  if (build.getCauses.size()>0) {
    cancel = true 
  }
} catch(e) {
  cancel = true
}