public KeyValuePair <IData, IData>?FindBefore(IData key)
{
var operation = new FindBeforeOperation(key);
Execute(operation);
return(operation.KeyValue);
}
private void WriteFindBeforeOperation(BinaryWriter writer, FindBeforeOperation operation)
{
KeyPersist.Write(writer, operation.FromKey);
writer.Write(operation.KeyValue.HasValue);
if (operation.KeyValue.HasValue)
{
KeyPersist.Write(writer, operation.KeyValue.Value.Key);
RecordPersist.Write(writer, operation.KeyValue.Value.Value);
}
}
