public override NumericDocValues GetNumeric(FieldInfo fieldInfo)
{
var field = FIELDS[fieldInfo.Name];
Debug.Assert(field != null);
// SegmentCoreReaders already verifies this field is valid:
Debug.Assert(field != null, "field=" + fieldInfo.Name + " fields=" + FIELDS);
var @in = (IndexInput)DATA.Clone();
var scratch = new BytesRef();
return new NumericDocValuesAnonymousInnerClassHelper(this, field, @in, scratch);
}