/**
    A minimal structural interface for the d3plus class instances that the
    framework wrappers drive. Every visualization, component, and shape exposes
    `.config()`; charts additionally expose `.render()` and `.destroy()`, plus
    loader methods (`data()`, `links()`, …) for their data-like fields.
*/
export interface D3plusInstance {
    config(c: Record<string, unknown>): unknown;
    render?(callback?: () => void): unknown;
    destroy?(): unknown;
    [key: string]: unknown;
}
/** Constructor type for d3plus visualization, component, and shape classes. */
export type D3plusConstructor = new (...args: any[]) => D3plusInstance;
/**
    Merges the supplied config objects over a fresh `{select: node}` target,
    routes any `<field>` + `<field>Format` pairs to their loader methods, then
    applies whatever remains via `instance.config()`. Shared by every d3plus
    framework wrapper so this routing lives in exactly one place.
    @param instance A d3plus class instance.
    @param node The DOM element the visualization renders into (its `select`).
    @param configs One or more config objects, merged left-to-right (later
    objects win); `undefined`/`null` entries are ignored.
*/
export declare function applyConfig(instance: D3plusInstance, node: Element, ...configs: (Record<string, unknown> | undefined)[]): D3plusInstance;
/**
    Stable hash that serializes functions by their source, so function-valued
    config props (accessors, formatters) still register as changed when their
    body changes. Wrappers use this to diff config across a framework's render
    cycles — two structurally identical config objects hash equal, so an
    unchanged config skips a re-render.
    @param val Any config value.
*/
export declare function hash(val: unknown): string;