/** Converts half-inch units to pixels (48px per inch). */
export declare function px(inches: number): string;
export declare class StyleSet {
    private readonly styles;
    set(prop: string, value: string): this;
    extend(other: StyleSet): void;
    get length(): number;
    toString(): string;
}
export declare class AttributeSet {
    private readonly attributes;
    set(attribute: string, value: string): this;
    toString(): string;
}