export declare class ObjectUtil {
    static transformKeysAndValues(object: any, newKey?: (key: string, value: any, keyList?: string[]) => string, newValue?: (key: string, value: any, keyList?: string[]) => any | {
        key: string;
        value: any;
    }[], mergeKeyValue?: (key: string, value: any, newKey: string, newValue: any, keyList?: string[]) => {
        key: string;
        value: any;
        remove?: boolean;
    }, keyList?: string[]): any;
    static transfromKeysAndValuesAsync(object: any, newKey?: (key: string, value: any, keyList?: string[]) => Promise<string>, newValue?: (key: string, value: any, keyList?: string[]) => Promise<any | {
        key: string;
        value: any;
    }[]>, mergeKeyValue?: (key: string, value: any, newKey: string, newValue: any, keyList?: string[]) => Promise<{
        key: string;
        value: any;
        remove?: boolean;
    }>, keyList?: string[]): Promise<any>;
    static nestedKeys(object: any, excludeKeys?: string[], onObject?: (key: string, value: any, keys: string[]) => void, onArray?: (key: string, value: any, keys: string[]) => void): string[];
    static duplicate<T>(object: any): T;
}