How do I write my `declare global` so this implementation compiles?

[scenic estuary]

sleepeasysoftware#0

Playground Link

Preview:```ts
export {}

let _storage = {
foo: "bar",
baz: 5,
}
type StorageType = typeof _storage

globalThis.storage = {
get(): StorageType {
return _storage
},
set(val: StorageType) {
_storage = val
},
}

declare global {
var storage: StorageType
...```

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[idle folio]

!ts