Apparently you can do:

```rust
#[bisync]
async fn bar() -> String {
    if ASYNC {
        println!("We are in async code.");
    } else if SYNC {
        println!("We are in blocking code.");
    } else {
        panic!("This is neither async nor blocking code but a secret third thing.");
    }
  
    baz().await
}
```

So you could things manually