declare type Primitive = string | number | boolean | never | undefined | null | symbol;
declare type Stringable = string | number | bigint | boolean;
declare type Concat<T extends Stringable, U extends Stringable, TJoiner extends string = "."> = T extends "" ? U : U extends U ? `${T}${TJoiner}${U}` : never;
export declare type DeepKeyof<T, TPrefix extends string = "", TKeys extends keyof T = Exclude<keyof T, keyof unknown[]>> = [T] extends [never] ? never : TKeys extends Stringable ? T extends Primitive ? never : Concat<TPrefix, TKeys> | DeepKeyof<T[TKeys], Concat<TPrefix, TKeys>> : never;
export {};