import { type DeepNullable } from "https://deno.land/x/ts_essentials@v9.1.2/lib/types.ts";
Recursive nullable
definition: T extends Builtin ? T | null : T extends Map<infer K, infer V> ? Map<DeepNullable<K>, DeepNullable<V>> : T extends ReadonlyMap<infer K, infer V> ? ReadonlyMap<DeepNullable<K>, DeepNullable<V>> : T extends WeakMap<infer K, infer V> ? WeakMap<DeepNullable<K>, DeepNullable<V>> : T extends Set<infer U> ? Set<DeepNullable<U>> : T extends ReadonlySet<infer U> ? ReadonlySet<DeepNullable<U>> : T extends WeakSet<infer U> ? WeakSet<DeepNullable<U>> : T extends Array<infer U> ? T extends IsTuple<T> ? [K in keyof T]: DeepNullable<T[K]> | null : Array<DeepNullable<U>> : T extends Promise<infer U> ? Promise<DeepNullable<U>> : T extends { } ? [K in keyof T]: DeepNullable<T[K]> : T | null