## upgrade.Migration


A step of `tether upgrade`: bring a dataset to [version](handles.DeltaHandle.md#tether.handles.DeltaHandle.version).


Usage

``` python
upgrade.Migration(
    version,
    title,
    plan,
    apply,
)
```


## Parameter Attributes


`version: int`  

`title: str`  

`plan: Callable[[Repo, Plan], None]`  

`apply: Callable[[Repo, Plan, UpgradeReport], None]`