export declare function cssTokenBreakpoints(attributeName: string, selector: (attributeName: string, attribute: string, device?: 'mobile' | 'tablet' | 'laptop' | 'desktop') => string, attributeValues: string[], cssPropertyPrefix?: string, generatedCssPropertyName?: string, selectorAttributeName?: string): CSSStyleSheet;
export declare class AttributeBreakpointHandlerDelegate {
    private readonly component;
    private readonly attributeName;
    private readonly cssVariable;
    private readonly attributeNameMobile;
    private readonly attributeNameTablet;
    private readonly attributeNameLaptop;
    private readonly attributeNameDesktop;
    private _attributeValue;
    constructor(component: HTMLElement, attributeName: string, attributeValue: (newValue: string, device: string) => string, cssVariable: string);
    private toCamelCase;
    init(defaultValue: string): void;
    attributeChangedCallback(attrName: string, oldValue: string, newValue: string): void;
    private setCSSProperty;
    private setCSSProperties;
    set attributeValue(value: (newValue: string, device: string) => string);
}