/**
 * An object that can perform an action.
 *
 * @public
 */
export default class CommandHandler {
    /**
     * Returns a function which executes the command.
     *
     * @public
     * @static
     * @param {CommandHandler} commandHandler
     * @returns {Function}
     */
    public static toFunction(commandHandler: CommandHandler): Function;
    /**
     * Returns a {@link CommandHandler} that delegates execution to a function.
     *
     * @public
     * @static
     * @param {Function} handler - The function which the command delegates to.
     * @returns {CommandHandler}
     */
    public static fromFunction(handler: Function): CommandHandler;
    /**
     * Execute the action.
     *
     * @public
     * @param {*} data
     * @returns {*}
     */
    public process(data: any): any;
    /**
     * @protected
     * @param {*} data
     * @returns {*}
     */
    protected _process(data: any): any;
    /**
     * Returns a string representation.
     *
     * @public
     * @returns {string}
     */
    public toString(): string;
}