Macro export_package_handler 

macro_rules! export_package_handler {
    ($handler:ty) => { ... };
}

Generate the eight ABI exports for a crate::PackageHandler.

holger_plugin_abi::export_package_handler!(holger_handler_skidbladnir::SkidbladnirHandler);

The type must implement PackageHandler and be constructible with Default::default(). Nothing else is required of the calling crate, and nothing about the handler’s logic passes through here — this macro moves bytes and calls the handler.