Repeating Group of segments

I have a repeating group of segments that I am not sure how to create the classes for.

```
ISA*
GS*
ST*
N7*
GA*
N7*
GA*
SE*
GE*
IEA*
```
I can have an arbitrary number of N7 and GA segments and each N7 is related to the GA below it so I would like to put each N7/GA group into the same containing class. I have tested my classes out separately (just an N7 and then just a GA) and they work fine individually, so I think it is the way I am attempting to group them together.

```csharp
[EdiSegment, EdiPath("N7")]
public class MyN7
{
// my fields
}

[EdiSegment, EdiPath("GA")]
public class MyGa
{
// my fields
}

[EdiSegmentGroup("N7", "GA")]
public class MyGroup
{
public MyN7 theN7 {get;set;}
public MyGa theGa {get;set;}
}

[EdiMessage]
public class TransactionSetHeader
{
// my ST stuff
public List TheN7AndGaGroups {get;set;}
// my SE stuff
}
```
There are no parse errors but while the GA segments will all parse fine, all of the N7 segments are always null. If I change the TransactionSetHeader to just have 1 instance of an N7 and a GA and modify my input file to only have 1 N7/GA pair, it will parse happily.

I have tried to put all of the N7 / GA fields into the same class (parse failure - it couldn't find a GA on the stack) and several other variants.

If I use this and serialize it to a file (instead of reading it in), it does serialize as expected.

Any suggestions?

Thanks

Start with EDI.Net deserialization of the EdiSegmentGroup containing MyN7 and MyGa, using the repeated N7/GA sample and the single-pair variant described in the issue. Compare how repeated groups are populated with the serialization behavior; done means every N7/GA pair populates one MyGroup without breaking the existing single-pair case.

Written by the indexing model from the issue text.