def wf_event_id?(id)
      return true if id.is_a?(String) && id =~ /^\d{13}:.+/
      raise Wavefront::Exception::InvalidEventId
    end
def wf_event_id?(id)
      return true if id.is_a?(String) && id =~ /^\d{13}:.+/
      raise Wavefront::Exception::InvalidEventId
    end
Ensure the given argument is a valid event ID. Event IDs are
 an epoch-millisecond timestamp followed by a : followed by the
 name of the event.

 @param id [String] the event ID to validate
 @return true if the event ID is valid
 @raise Wavefront::Exception::InvalidEventID if the
   event ID is not valid