pub fn register_rust_extractor_factory(
type_name: &str,
factory: Box<dyn Fn() -> PyExtractor + Send + Sync>,
) -> Result<(), Error>Expand description
Registers a factory that produces a PyExtractor for the given type name.
Crates (e.g. persistence) call this at load time for each Rust custom data type.
When register_custom_data_class(cls) is called with that type’s class, the factory is invoked
and the extractor is registered in the main PyExtractor registry.
§Errors
Returns an error if the type name is already registered.