import { ImmutableMap } from "@tsplus/stdlib/collections/ImmutableMap/definition";
/**
 * Performs a union of this `ImmutableMap` and that `ImmutableMap`.
 * @tsplus pipeable-operator ImmutableMap +
 * @tsplus static ImmutableMap.Aspects union
 * @tsplus pipeable ImmutableMap union
 * @tsplus location "@tsplus/stdlib/collections/ImmutableMap/union"
 */
export declare function union<K1, V1>(that: ImmutableMap<K1, V1>): <K0, V0>(self: import("./definition").ImmutableMap<K0, V0>) => import("./definition").ImmutableMap<K1 | K0, V1 | V0>;
//# sourceMappingURL=union.d.ts.map