How to use the @ng-bootstrap/ng-bootstrap.ModalDismissReasons.ESC function in @ng-bootstrap/ng-bootstrap

private getDismissReason(reason: any): string {
    if (reason === ModalDismissReasons.ESC) {
      return 'by pressing ESC';
    } else if (reason === ModalDismissReasons.BACKDROP_CLICK) {
      return 'by clicking on a backdrop';
    } else {
      return  `with: ${reason}`;
    }
  }
}

private getDismissReason(reason: any): string {
    if (reason === ModalDismissReasons.ESC) {
      return 'by pressing ESC';
    } else if (reason === ModalDismissReasons.BACKDROP_CLICK) {
      return 'by clicking on a backdrop';
    } else {
      return `with: ${reason}`;
    }
  }

private getDismissReason(reason: any): string {
    if (reason === ModalDismissReasons.ESC) {
      return 'by pressing ESC';
    } else if (reason === ModalDismissReasons.BACKDROP_CLICK) {
      return 'by clicking on a backdrop';
    } else {
      return  `with: ${reason}`;
    }
  }
}

private getDismissReason(reason: any): string {
    if (reason === ModalDismissReasons.ESC) {
      return "by pressing ESC";
    } else if (reason === ModalDismissReasons.BACKDROP_CLICK) {
      return "by clicking on a backdrop";
    } else {
      return `with: ${reason}`;
    }
  }
}

private getDismissReason(reason: any): string {
    if (reason === ModalDismissReasons.ESC) {
      return 'by pressing ESC';
    } else if (reason === ModalDismissReasons.BACKDROP_CLICK) {
      return 'by clicking on a backdrop';
    } else {
      return  `with: ${reason}`;
    }
  }

private getDismissReason(reason: any): string {
    if (reason === ModalDismissReasons.ESC) {
      return 'by pressing ESC';
    } else if (reason === ModalDismissReasons.BACKDROP_CLICK) {
      return 'by clicking on a backdrop';
    } else {
      return `with: ${reason}`;
    }
  }

private getDismissReason(reason: any): string {
    if (reason === ModalDismissReasons.ESC) {
      return 'by pressing ESC';
    } else if (reason === ModalDismissReasons.BACKDROP_CLICK) {
      return 'by clicking on a backdrop';
    } else {
      return  `with: ${reason}`;
    }
  }
}

private getDismissReason(reason: any): string {
    if (reason === ModalDismissReasons.ESC) {
      return "by pressing ESC";
    } else if (reason === ModalDismissReasons.BACKDROP_CLICK) {
      return "by clicking on a backdrop";
    } else {
      return `with: ${reason}`;
    }
  }
}

.catch((reason) => {
                if (reason && reason !== ModalDismissReasons.BACKDROP_CLICK && reason !== ModalDismissReasons.ESC) {
                    this.alertService.errorStatus$.next(reason);
                }
            })
            .then(() => {

private getDismissReason(reason: any): string {
    if (reason === ModalDismissReasons.ESC) {
      return 'by pressing ESC';
    } else if (reason === ModalDismissReasons.BACKDROP_CLICK) {
      return 'by clicking on a backdrop';
    } else {
      return  `with: ${reason}`;
    }
  }