/**
 * Collects all the iframes within a given node and its children.
 * @param node - The node to start collecting iframes from.
 * @returns An array of HTMLIFrameElement objects representing the iframes found.
 */
export declare const collectIframes: (node: Node) => HTMLIFrameElement[];
/**
 * Traverses the DOM tree starting from a given node and applies a function to each element node.
 * @param node - The starting node for traversal.
 * @param func - The function to be applied to each element node.
 */
export declare const traverseNodes: (node: Node, func: (node: HTMLElement) => void) => void;
/**
 * Checks if the browser supports adopting style sheets.
 */
export declare const supportsAdoptingStyleSheets: boolean;