How to use the @loopback/core.MethodDecoratorFactory.createDecorator function in @loopback/core

export function secured(
  type: SecuredType = SecuredType.IS_AUTHENTICATED, // more on this below
  roles: string[] = [],
  strategy: string = 'jwt',
  options?: object,
) {
  // we will use a custom interface. more on this below
  return MethodDecoratorFactory.createDecorator(AUTHENTICATION_METADATA_KEY, {
    type,
    roles,
    strategy,
    options,
  });
}

export function operation(verb: string, path: string, spec?: OperationObject) {
  return MethodDecoratorFactory.createDecorator>(
    OAI3Keys.METHODS_KEY,
    {
      verb,
      path,
      spec,
    },
    {decoratorName: '@operation'},
  );
}

export function authorize(permissions: string[]) {
  return MethodDecoratorFactory.createDecorator(
    AUTHORIZATION_METADATA_ACCESSOR,
    {
      permissions: permissions || [],
    },
  );
}