956 - DeepPick

[koSakano]

type DeepPick<T extends Record<string, any>, U extends string> = (U extends string ? U extends `${infer F}.${infer R}` ? (arg:{[K in F]:DeepPick<T[F],R>}) => void : U extends keyof T ? (arg: Pick<T,U>) => void : (arg: unknown) => void : never) extends (arg:infer Z)=>void? Z:never;