const unsubscribe = launch.onEvent((type, payload) => console.log(type, payload));
unsubscribe();
const snapshot = launch.getResult();     // Latest cached saved result, or null.
const details = await launch.getDetails(); // Fresh saved result with runtime data.
const finalResult = await launch.close(); // Wait for save acknowledgement; retain frame on failure.
await launch.destroy();                 // Gracefully close, then remove iframe/listeners.
await player.destroy();                 // Destroy all launches owned by this player instance.