export type Primitive =
  | string
  | number
  | boolean
  | symbol
  | null
  | undefined
  | void
export interface SerializedObj {
  [key: string]: Primitive | FrozenObj | FrozenArray
  [key: number]: Primitive | FrozenObj | FrozenArray
}
export type FrozenObj = Readonly<SerializedObj>
export interface FrozenArray extends Readonly<Serialized[]> {
  readonly(x: number): Serialized
}
export type Serialized = SerializedObj | Primitive | FrozenObj | FrozenArray