export declare function nodeHasUnderline(node: Node, container: Node): boolean;
export declare function cascadingComputedStyleHasUnderline(computedStyles: CSSStyleDeclaration[]): boolean;
export declare function styleHasUnderline(style: CSSStyleDeclaration | null): boolean;
export declare function textDecorationHasUnderline(textDecoration: string | null): boolean;
export declare function clearUnderlineInElement(element: HTMLElement | SVGElement): void;
export declare function clearUnderlineInRange(container: Node, range: Range): Range;
export declare function setUnderlineInElement(element: HTMLElement | SVGElement): void;
export declare function setUnderlineInRange(container: Node, range: Range): Range;