import { ApiEvent, ApiHandlerConstructor, BigsbyConfig, HandlerClassesInput } from "../types";
export declare function getApiVersion(event: ApiEvent, config: NonNullable<BigsbyConfig["api"]["versioning"]>): string;
export declare function isVersionedHandlerMap(classes: HandlerClassesInput): classes is {
    [VersionId: string]: ApiHandlerConstructor;
};