declare type KnownAnimationEventStates = "void" | true | false;
export interface TypedAnimationEvent extends Omit<AnimationEvent, "toState" | "fromState"> {
    toState: KnownAnimationEventStates;
    fromState: KnownAnimationEventStates;
}
export declare const fadeIn: import("@angular/animations").AnimationTriggerMetadata[];
export {};
