method SortedMapNode.prototype.modifyAtRe-exportimport { SortedMapNode } from "https://deno.land/x/rimbu@1.2.1/sorted/map-custom/index.ts"; modifyAt(atKey: K, options: { ifNew?: OptLazyOr<V, Token>; ifExists?: ((currentEntry: V, remove: Token) => V | Token) | V; }): SortedMap<K, V>ParametersatKey: Koptions: { ifNew?: OptLazyOr<V, Token>; ifExists?: ((currentEntry: V, remove: Token) => V | Token) | V; }ReturnsSortedMap<K, V>