export interface FeedbackResult {
    score: number | null;
    feedback: Feedback | null;
}
export interface Feedback {
    warning: string | null;
    suggestions: string[];
}
export declare abstract class IPasswordStrengthMeterService {
    abstract score(password: string): number;
    abstract scoreWithFeedback(password: string): FeedbackResult;
    abstract scoreAsync(password: string): Promise<number>;
    abstract scoreWithFeedbackAsync(password: string): Promise<FeedbackResult>;
}