/**
* Object whose keys are the values from T
*/
type ValoueOf<T extends object> = [T keyof T]

/**
 Example: use values of object as keys of type
*/
const topics = {
  NewMessages: "messages:new"
}

type Topics = ValueOf<typeof topics>

const pubSub = createPubSub<{
  [key in Topics]: [string]
}>()

pubSub.publish(topics.NewMessages, newMessage)