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# CMTaggedBufferGroupCreateCombined

Creates a new tagged buffer group from an array of existing tagged buffer groups.

```
extern OSStatus CMTaggedBufferGroupCreateCombined(CFAllocatorRef allocator, CFArrayRef taggedBufferGroups, CMTaggedBufferGroupRef*groupOut);
```

## Parameters

`allocator`

The allocator to use for the new tag collection. Pass `kCFAllocatorDefault` to use the default global allocator.

`taggedBufferGroups`

An array of tagged buffer groups to combine into the new, single buffer group.

`groupOut`

The output destination for the new tagged buffer group.

## Return Value

Returns `0` on success and a value from Tagged Buffer Group Error Codes on failure.

## Discussion

Buffers strongly retain their references when creating a new tagged buffer group, rather than performing a copy.

---

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