let mut store = Store::new(&engine, state);

    let component = Component::from_file(&engine, "component.wasm")?;
    let instance = linker.instantiate_async(&mut store, &component).await?;
    let mut result = [];
    if let Some(func) = instance.get_func(&mut store, function) {
      func.call_async(&mut store, &[], &mut result).await?;
      println!("result : {:?}", result);
    } else {
      println!("No func")
    }