Как в Unity3D вызывать C# код из java?

public class PluginWrapper : MonoBehaviour {
...
void Update () {
        AndroidJavaObject device = plugin.CallStatic<AndroidJavaObject>("getDevice", midiManager, 1);
        Debug.Log("UPDATE!!!!!!!!!");
	}

    void ApplyDamage(string str)
    {
        Debug.Log("TEST!!!!!!!!!" + str);
    }
}

public static MidiDeviceInfo getDevice(MidiManager m, int num){
        UnityPlayer.UnitySendMessage ("PluginWrapper", "ApplyDamage", "Message to send teststr");
        return m.getDevices()[num];
    }

public class DeviceCallback : AndroidJavaProxy
    {
        public DeviceCallback() : base("android.media.midi.MidiManager.DeviceCallback") { }

        void onDeviceAdded(AndroidJavaObject info)
        {
                    Debug.Log("TEST!!!!!!!!!");
        }
    }