export declare function generateUUIDv4(): string;
export declare function isUUIDv4(text: string): boolean;
export declare function getErrorMessage(e: unknown): string;
export declare function applyDefaults<T>(source: T | undefined, defaults: T): T;
/**
 * Allow knowing the file path of the function calling us.
 */
export declare function getCallerFilePath(): string | undefined;
export declare enum PriorityLevel {
    veryLow = -200,
    low = -100,
    default = 0,
    high = 100,
    veryHigh = 200
}
export interface ValueWithPriority<T> {
    value: T;
    priority: PriorityLevel;
}
/**
 * Sorts a list of items based on their priority level in ascending order.
 * Items with lower priority values (e.g., -200) will appear first in the returned array.
 * @param values The list of items to sort, each containing a value and a priority.
 * @returns An array of just the values, sorted by priority. Returns undefined if the input is undefined.
 */
export declare function sortByPriority<T>(values: undefined | ValueWithPriority<T>[]): undefined | (T[]);
/**
 * Allows avoiding calling a function before n-milliseconds is elapsed.
 */
export declare class DontCallBeforeElapsed {
    readonly requireMs: number;
    private lastTime;
    constructor(requireMs?: number);
    check(): boolean;
}