export declare function last<T extends unknown>(arr: T[], defaultValue: T): T;
export declare function getDateStringFromTimestamp(epochTimestamp: number): string;
export declare function mergeProps<T, T2, K extends keyof T & keyof T2>(props1: T, props2: T2, { keys, defaultValue }: {
    keys: string[];
    defaultValue: unknown;
}): Pick<T, K>;
export declare function isNil(value: unknown): boolean;
export declare function uniqById<T extends {
    id: string;
}>(values: T[]): T[];
export declare function castToTwoDecimalFloat(num: number): number;