import { Radio } from './radio.component';
/**
 * Used to emit changes performed on a `Radio`.
 */
export declare class RadioChange {
    /**
     * Contains the `Radio` that has been changed.
     */
    source: Radio | null;
    /**
     * The value of the `Radio` encompassed in the `RadioChange` class.
     */
    value: string;
    constructor(source: Radio, value: string);
}