Any reason this can't just be:

```
return [
  cacheInstancePut.set(longKey, longVal, 100000),
  cacheInstancePut.set(tinyKey, tinyVal, 100000),
  cacheInstancePut.set(nullKey, null, 100000),
  cacheInstancePut.set(undefinedKey, undefined, 100000),
  cacheInstancePut.mset(items, 100000) 
]