import { LitElement } from 'lit';
import { DDSPropertyDeclaration } from "./dds-property.js";
/**
 * Base class for all DDS (DAIKIN Design System) components.
 * Extends LitElement with enhanced property handling capabilities including fallback values
 * and property validation.
 *
 * @example
 * ```typescript
 * class MyComponent extends DDSElement {
 *   @property({ reflect: true, fallbackValue: "" })
 *   name!: string;
 * }
 * ```
 */
export declare class DDSElement extends LitElement {
    /** The version of the DDS library */
    static readonly version: string;
    /**
     * Override of LitElement's getPropertyDescriptor to add support for fallback values
     * and property validation.
     *
     * @param name - The property name (e.g., "value", "disabled")
     * @param key - The backing property key used for internal storage (generated by Lit)
     * @param options - DDS property declaration options including fallbackValue and isAllowedValue
     * @returns Property descriptor with enhanced getter/setter logic
     */
    static getPropertyDescriptor(name: PropertyKey, key: string | symbol, { fallbackValue, isAllowedValue, ...options }: DDSPropertyDeclaration): PropertyDescriptor | undefined;
    /**
     * Retrieves the backing property value for a given property name.
     * This allows access to the underlying stored value before any fallback logic is applied.
     *
     * Why is this needed?
     * - The public property getter may return a fallback value when the actual value is undefined.
     * - Sometimes we need to know if the property was explicitly set or if we're using a fallback.
     * - This method provides access to the raw backing value stored by Lit.
     *
     * @template T - The property key type extending keyof this
     *
     * @param name - The property name to retrieve the backing value for
     * @returns The raw backing property value or undefined if not found
     */
    protected getBackingProperty<T extends keyof this>(name: T): this[T] | undefined;
}