/**
 * Options for waitForConnectedDescendants.
 * @public
 */
export interface WaitForDescendantsOptions {
    /**
     * If true, only checks immediate children. If false, checks all descendants.
     * @defaultValue false
     */
    shallow?: boolean;
    /**
     * Timeout in milliseconds. If the undefined descendants haven't resolved within
     * this duration, the callback fires anyway. Set to `0` to wait indefinitely.
     * @defaultValue 50
     */
    timeout?: number;
}
/**
 * Waits for all custom element descendants to be defined before invoking the callback.
 * Uses `customElements.whenDefined()` to deterministically wait for element registration,
 * with an optional timeout fallback.
 *
 * @param target - The parent element to check for undefined descendants.
 * @param callback - The callback to invoke when all descendants are defined.
 * @param options - Configuration options for the wait behavior.
 * @public
 *
 * @example
 * ```typescript
 * waitForConnectedDescendants(this, () => {
 *   // All custom element descendants are now defined
 *   this.processChildren();
 * });
 * ```
 */
export declare function waitForConnectedDescendants(target: HTMLElement, callback: () => void, options?: WaitForDescendantsOptions): void;
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