// LUCENENET specific: Pass DocValuesUpdate instead of the value, since this class knows the type to retrieve, but the caller does not.
public override void AddFromUpdate(int doc, DocValuesUpdate update)
{
Add(doc, ((NumericDocValuesUpdate)update).value);
}
/// <summary> /// Add an update to a document from a <see cref="DocValuesUpdate"/>. /// The <see cref="DocValuesUpdate"/>'s value should be <c>null</c> to unset a value. /// Note that the value is exposed by casting to the apprpriate <see cref="DocValuesUpdate"/> subclasss. /// </summary> public abstract void AddFromUpdate(int doc, DocValuesUpdate update);