import { UnityReleaseStream } from "./unityChangeset.js";
import { SearchMode } from "./index.js";
/**
 * Group array of objects by key
 */
export declare const groupBy: <T, K extends string>(arr: T[], key: (i: T) => K) => Record<K, T[]>;
/**
 * Convert search mode to array of streams
 */
export declare function searchModeToStreams(searchMode: SearchMode): UnityReleaseStream[];
/**
 * Sanitize version string to prevent injection attacks
 */
export declare function sanitizeVersion(version: string): string;
/**
 * Validate filter options
 */
export declare function validateFilterOptions(options: {
    min?: string;
    max?: string;
    grep?: string;
}): void;