ComponentInstruction(String urlPath, List<String> urlParams, RouteData data, componentType, bool terminal, String specificity, [ Map<String, String> params, String routeName ])

Source 

ComponentInstruction(this.urlPath, this.urlParams, RouteData data,
    this.componentType, this.terminal, this.specificity,
    [this.params, this.routeName]) {
  this.routeData = data ?? BLANK_ROUTE_DATA;
}