/**
 * PHP parity: Illuminate\View\ComponentAttributeBag (simplified — see
 * design doc's "Não faz" for what's intentionally not replicated: no
 * array/conditional-keys form of class(), no renderIsland wiring).
 */
export declare class AttributeBag {
    private attributes;
    constructor(attributes?: Record<string, any>);
    get(name: string, defaultValue?: any): any;
    has(name: string): boolean;
    /**
     * Merges the child's own default classes with whatever `class` value
     * the parent tag passed (if any), keeping every other attribute as-is.
     */
    class(defaultClasses: string): AttributeBag;
    /**
     * Fills in `defaults` for any key the parent didn't already pass —
     * existing attributes always win.
     */
    merge(defaults: Record<string, any>): AttributeBag;
    toString(): string;
}