public static extern VwFeature GetFeatures(VwHandle vw, VwExample example, ref SizeT length);
public static extern float GetPrediction(VwExample example);
public static extern BytePtr GetTag(VwExample example);
public static extern float GetTopicPrediction(VwExample example, SizeT i);
public static extern float GetImportance(VwExample example);
public static extern float Learn(VwHandle vw, VwExample example);
public static extern VwFeatureSpace ExportExample(VwHandle vw, VwExample example, ref SizeT length);
public static extern float GetLabel(VwExample example);
public static extern void FinishExample(VwHandle vw, VwExample example);
public static extern void AddLabel(VwExample example, float label = float.MaxValue, float weight = 1, float initial = 0);
public static extern float Predict(VwHandle vw, VwExample example);
public static extern float GetInitial(VwExample example);
public static extern SizeT GetTagLength(VwExample example);
public static extern SizeT GetFeatureNumber(VwExample example);
public static extern void ReturnFeatures(VwExample features);
public static extern IntPtr GetMultilabelPredictions(VwHandle vw, VwExample example, ref SizeT length);