import type { Vec2 } from '../../math';
import type { TweenOptions } from 'svelte/motion';
export declare const unique_id: (prefix?: string) => string;
export declare const resolve_line_tween: (line_tween: TweenOptions<string> | undefined, load: {
    series: number;
    points: number;
}) => TweenOptions<string> | undefined;
export declare function calc_auto_range<Item>(items: Iterable<Item>, get_values: (item: Item) => Iterable<number>): Vec2;
export declare const observe_size: <El extends Element>(on_size: (size: {
    height: number;
    width: number;
}, element: El) => void) => (element: El) => () => void;