Visit the official Mio website to download the necessary files.
In an async runtime, futures are tracked via wakers. In a raw Mio client, the developer tracks connections via Token IDs. When the poll method returns events, it provides the Token , allowing the client to look up the specific connection in a data structure (usually a HashMap<Token, Connection> ).
Follow the provided installation instructions, which typically involve extracting the ZIP file and placing the JAR into your Minecraft mods folder.