import { AnimationReferenceMetadata } from '@angular/animations';
export declare class AnimationUtil {
    private static _instance;
    private oppositeAnimation;
    private horizontalAnimations;
    private verticalAnimations;
    private constructor();
    static instance(): AnimationUtil;
    reverseAnimationResolver(animation: AnimationReferenceMetadata): AnimationReferenceMetadata;
    isHorizontalAnimation(animation: AnimationReferenceMetadata): boolean;
    isVerticalAnimation(animation: AnimationReferenceMetadata): boolean;
}