code: func Matcher(specifiers ...api.Event) events.MatcherFunc {
  	return events.MatcherFunc(func(event events.Event) bool {
  		for _, s := range specifiers {
  			if s.Matches(event) {
  				return true
  			}
  		}
  		return false
  	})
  }
docs: // Matcher returns an events.Matcher that Matches the specifiers with OR logic.