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# AVCoreAnimationBeginTimeAtZero

A value that sets an animation begin time to `0`.

```
let AVCoreAnimationBeginTimeAtZero: CFTimeInterval
```

## Discussion

The constant is a small, non-zero, positive value which prevents CoreAnimation from replacing `0.0` with <doc://com.apple.documentation/documentation/QuartzCore/CACurrentMediaTime()>.

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