import { InputEvt } from '../../inputEvents';
import InputMapper from './InputMapper';
/**
 * An `InputMapper` that applies a function to all events it receives.
 *
 * Useful for automated testing.
 */
export default class FunctionMapper extends InputMapper {
    private fn;
    constructor(fn: (event: InputEvt) => InputEvt);
    onEvent(event: InputEvt): boolean;
}