---
title: Collection Implementations
framework: coremedia
role: collectionGroup
role_heading: API Collection
path: coremedia/cmreadonlydatablockbuffer/collection-implementations
---

# Collection Implementations

## Topics

### Instance Properties

- [count](coremedia/cmreadonlydatablockbuffer/count.md)
- [isEmpty](coremedia/cmreadonlydatablockbuffer/isempty.md)