public unsafe void OnFirstPacketReceived(global::Org.Webrtc.MediaStreamTrack.MediaType p0)
            {
                if (id_onFirstPacketReceived_Lorg_webrtc_MediaStreamTrack_MediaType_ == IntPtr.Zero)
                {
                    id_onFirstPacketReceived_Lorg_webrtc_MediaStreamTrack_MediaType_ = JNIEnv.GetMethodID(class_ref, "onFirstPacketReceived", "(Lorg/webrtc/MediaStreamTrack$MediaType;)V");
                }
                JValue *__args = stackalloc JValue [1];

                __args [0] = new JValue((p0 == null) ? IntPtr.Zero : ((global::Java.Lang.Object)p0).Handle);
                JNIEnv.CallVoidMethod(((global::Java.Lang.Object) this).Handle, id_onFirstPacketReceived_Lorg_webrtc_MediaStreamTrack_MediaType_, __args);
            }
 static void n_OnFirstPacketReceived_Lorg_webrtc_MediaStreamTrack_MediaType_(IntPtr jnienv, IntPtr native__this, IntPtr native_p0)
 {
     global::Org.Webrtc.RtpReceiver.IObserver      __this = global::Java.Lang.Object.GetObject <global::Org.Webrtc.RtpReceiver.IObserver> (jnienv, native__this, JniHandleOwnership.DoNotTransfer);
     global::Org.Webrtc.MediaStreamTrack.MediaType p0     = global::Java.Lang.Object.GetObject <global::Org.Webrtc.MediaStreamTrack.MediaType> (native_p0, JniHandleOwnership.DoNotTransfer);
     __this.OnFirstPacketReceived(p0);
 }