prow/config/jobs.go
func (ps Presubmit) TriggerMatches(body string) bool {
	return ps.Trigger != "" && ps.re.MatchString(body)
}
func (ps Presubmit) TriggerMatches(body string) bool {
	return ps.Trigger != "" && ps.re.MatchString(body)
}
// TriggerMatches returns true if the comment body should trigger this presubmit.
//
// This is usually a /test foo string.