export declare type Reaction = {
    readonly id: symbol;
    readonly fn: () => any;
    readonly invoke: () => any;
    round: number;
};
/**
 * TODO
 */
export declare function registerReaction(fn: () => any, customInvoker?: () => any): Reaction;
/**
 * TODO
 */
export declare function invokeReaction(reaction: Reaction): any;
/**
 * Removes reaction from reaction collection and ensures no observables
 * are set to trigger it in the future.
 */
export declare function removeReaction(reactionId: symbol): void;
/**
 * TODO
 */
export declare function getReaction(reactionId: symbol): Reaction;
/**
 * TODO
 */
export declare function isReactionInProgress(): boolean;
/**
 * TODO
 */
export declare function getActiveReaction(): Reaction;
/**
 * TODO
 */
export declare function setActiveReactionId(reactionId: symbol): void;
/**
 * TODO
 */
export declare function isInReactionCollection(reactionId: symbol): boolean;