import { CanActivate, ExecutionContext } from '@nestjs/common';
import { Observable } from 'rxjs';
import { User } from './types/User';
export declare class RequireGroupGuard<UserType extends User, GroupType extends UserType['memberOf'][number] = string> implements CanActivate {
    private requiredGroup;
    constructor(requiredGroup: GroupType);
    canActivate(context: ExecutionContext): boolean | Promise<boolean> | Observable<boolean>;
}