import { JsonType, FeatureFlagValue } from '@posthog/core';
import { PostHog } from '../posthog-rn';
export declare function useFeatureFlag(flag: string, client?: PostHog): FeatureFlagValue | undefined;
export type FeatureFlagWithPayload = [FeatureFlagValue | undefined, JsonType | undefined];
export declare function useFeatureFlagWithPayload(flag: string, client?: PostHog): FeatureFlagWithPayload;