message: Work for - allow to use async filter
diff: import { NgModule } from "@angular/core";
  +import { CommonModule } from "@angular/common";
  import { SurveyComponent } from "./survey.component";
  @NgModule({
  @@ -6,6 +7,7 @@ import { SurveyComponent } from "./survey.component";
  SurveyComponent
  ],
  imports: [
  + CommonModule
  ],
  exports: [
  SurveyComponent
  