Function ensureKey

ensureKey<T>(
    obj: Record<string, T>,
    key: string,
    createFn: (key?: string, obj?: Record<string, T>) => T,
): T
Call a create function if key does not yet exist on an object. Returns the found or created object. Example:
```
function createRoom(room, rooms) { return new Room() }
ensureKey(rooms, room, createRoom).enter()
```
Type Parameters
- T
Parameters
- obj: Record<string, T>
- key: string
- createFn: (key?: string, obj?: Record<string, T>) => T
Returns T
- Defined in common/data/utils.ts:12