def wf_alert_id?(id)
      id = id.to_s if id.is_a?(Numeric)
      return true if id.is_a?(String) && id.match(/^\d{13}$/)
      raise Wavefront::Exception::InvalidAlertId
    end
def wf_alert_id?(id)
      id = id.to_s if id.is_a?(Numeric)
      return true if id.is_a?(String) && id.match(/^\d{13}$/)
      raise Wavefront::Exception::InvalidAlertId
    end
Ensure the given argument is a valid Wavefront alert ID.
 Alerts are identified by the epoch-nanosecond at which they
 were created.

 @param id [String] the alert ID to validate
 @return True if the alert ID is valid
 @raise Wavefront::Exception::InvalidAlertId if the alert ID is
   not valid