import { Tree } from "@tsplus/stdlib/collections/Tree/definition";
/**
 * Convert a `Tree<A>` into a `Tree<B>` using a function from `Tree<A> => B`
 * applied to each node in the Tree.
 * @tsplus static Tree.Aspects extend
 * @tsplus pipeable Tree extend
 * @tsplus location "@tsplus/stdlib/collections/Tree/extend"
 */
export declare function extend<A, B>(f: (wa: Tree<A>) => B): (self: Tree<A>) => Tree<B>;
//# sourceMappingURL=extend.d.ts.map