Sandbox.TaskSource.CreateLinkedTokenSource

// Create our "dual triggered" token
var cts = TaskSource.CreateLinkedTokenSource();

async Task Load(TaskSource ts)
{
    await ts.DelaySeconds(10, cts.Token); // Respect Both ts and cts.Token
    Finish();
}

// Manually Cancel our token 
cts.Cancel();

• You need manual cancellation
• You need to expose cancellation to callers
• Cancellation is not tied to engine lifetimes

• Async logic belongs to gameplay code
• Cancellation must follow engine/session rules

• Logic is BOTH scoped to the game and you need manual cancellation