Function deserialize

Hydrate a Store from a v2 snapshot.

Two forms:

• deserialize(snap) builds and returns a fresh Store.
• deserialize(store, snap) hydrates store in place — every existing node is discarded and replaced with the snapshot's contents — and returns nothing. This is the form history/undo use: it reuses the caller's Store instance (and its throttle policy, subscribers, and identity) rather than swapping in a new one.

Hydrate a Store from a v2 snapshot.

Two forms:

• deserialize(snap) builds and returns a fresh Store.
• deserialize(store, snap) hydrates store in place — every existing node is discarded and replaced with the snapshot's contents — and returns nothing. This is the form history/undo use: it reuses the caller's Store instance (and its throttle policy, subscribers, and identity) rather than swapping in a new one.