A "box" that stores a IdString32Box object across multiple frames.
Normally, IdString32s are temporary objects that can only be safely used within a single frame. When you need an IdString32 value to persist across multiple frames, you can call IdString32Box.store() to store the vector in a IdString32, and [IdString32.unbox()] to retrieve the stored values.
For more information, see Object Lifetimes and Userdata Binding.