export declare const combineAsync: <T, U>(this: import("augmentative-iterable").AnyIterable<T>, iterable: import("augmentative-iterable").AnyIterable<U>, baseKeyA?: import("../types-internal").AnyMapper<T>, baseKeyB?: import("../types-internal").AnyMapper<U>) => import("augmentative-iterable").AnyIterable<[T, U]>;