/**
 * @interface AbstractTween
 * Defines the interface expected by `Runner` for tween-like things.
 */
export default class AbstractTween {
    /**
     * @abstract
     * For a given elapsed time relative to the start of the tween, calculates the value at that time and calls the
     * `callback` function with that value. If the given time is during the `delay` period, the callback will not be
     * invoked.
     * @param {number} time
     */
    gotoElapsedTime(time: number): void;
    /**
     * @abstract
     * Like `gotoElapsedTime` but goes to the very end of the tween.
     */
    gotoEnd(): void;
    /**
     * @abstract
     * For a given elapsed time relative to the start of the tween, determines if the tween is in its completed end state.
     * @param {number} time
     * @return {boolean}
     */
    isDoneAtElapsedTime(time: number): boolean;
}