/**
 * Abstract class representing a data source for extensions.
 * Provides methods to enable and add extensions, and to get the extension ID.
 */
declare abstract class ExtensionsDataSource {
    /**
     * Abstract method to add an extension. Implementations must provide their own logic.
     *
     * @abstract
     */
    abstract addExtension(): void;
    /**
     * Abstract method to get the unique identifier for the extension.
     * Implementations must provide their own logic to return the extension ID.
     *
     * @abstract
     * @returns {string} The unique identifier for the extension.
     */
    abstract getExtensionId(): string;
    /**
     * Enables the extension if it is not already enabled.
     * Checks if the extension is enabled using `CometChat.isExtensionEnabled()` and
     * adds the extension if it is enabled.
     *
     * @returns {void}
     */
    enable(): void;
}
export { ExtensionsDataSource };