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@Directive({
  selector: '[connectForm]'
})
export class ConnectFormDirective {
  @Input('connectForm') path: string;

  constructor(private formGroupDirective: FormGroupDirective,
    private store: Store<AppState> ) {
      
    ngOnInit() {
      // Update the form value based on the state
      this.store.select(state => state.forms[this.path]).take(1).subscribe(formValue => {
        this.formGroupDirective.form.patchValue(formValue);
      });
    }
  }
}