/**
 * Pauses execution for a few moments before resolving
 */
export declare function sleep(amount: number): Promise<void>;
/**
 * Given an input array,
 * reduces it to a 2D array
 * where each index is a certain chunk size
 */
export declare function chunkArray<T>(arr: T[], size?: number): T[][];
/**
 * Attempts to read the supplied path to a file that exports a default function
 */
export declare function loadDefaultExportFunction(filePath: string | undefined): Promise<any>;
/**
 * Checks whether or not a package.json key is allowed to be updated / managed by "lets-version"
 */
export declare function isPackageJSONDependencyKeySupported(key: string, updatePeer: boolean, updateOptional: boolean): boolean;
/**
 * Left-indents content to a certain depth
 */
export declare function indentStr(content: string, indentChar?: string, depth?: number): string;