This allows getN to return a detailed explanation of any type signature mismatch, and makes it easy to just use `?` on the result of getN rather than constructing a (necessarily vaguer) error message in the caller.
Wasmtime Embedding API
The wasmtime crate is an embedding API of the wasmtime WebAssembly runtime.
This is intended to be used in Rust projects and provides a high-level API of
working with WebAssembly modules.
If you're interested in embedding wasmtime in other languages, you may wish to
take a look a the C embedding API instead!