export declare function toggleInlineTag(root: HTMLElement, tag: 'strong' | 'em' | 'u' | 'span', attrs?: Record<string, string>): void;
export declare function surroundInline(range: Range, tag: string, attrs?: Record<string, string>): void;
export declare function unwrap(node: HTMLElement): void;
export declare function rgbToHex(rgb: string): string;
export declare function setFontFamily(root: HTMLElement, family: string): void;