---
title: Sequence Implementations
framework: foundation
role: collectionGroup
role_heading: API Collection
path: foundation/nsindexset/sequence-implementations
---

# Sequence Implementations

## Topics

### Instance Properties

- [underestimatedCount](foundation/nsindexset/underestimatedcount.md)

### Instance Methods

- [makeIterator()](foundation/nsindexset/makeiterator().md)