---
title: permitEmptyReference
framework: coremedia
role: symbol
role_heading: Type Property
path: coremedia/cmblockbuffer/flags/permitemptyreference
---

# permitEmptyReference

## Declaration

```swift
static let permitEmptyReference: CMBlockBuffer.Flags
```

## See Also

### Type Properties

- [alwaysCopyData](coremedia/cmblockbuffer/flags/alwayscopydata.md)
- [assureMemoryNow](coremedia/cmblockbuffer/flags/assurememorynow.md)
- [dontOptimizeDepth](coremedia/cmblockbuffer/flags/dontoptimizedepth.md)