---
title: FromChain
framework: DriverKit
role: symbol
role_heading: Static Method
platforms: [DriverKit, iOS, iPadOS, macOS]
path: driverkit/iocommand/3758239-fromchain
---

# FromChain

## Declaration

```occ
static IOCommand * FromChain(queue_chain_t *link);
```

## Return Value

Queue used to queue commands.

## Discussion

Given the queue_chain_t from CommandChain, return the IOCommand instance.