## subtype


A normalized generic type which checks subscripts.


Usage

``` python
subtype()
```


Transforms a generic alias into a concrete type which supports `issubclass` and `isinstance`. If the type ends up being equivalent to a builtin, the builtin is returned.


## Methods

| Name | Description |
|----|----|
| [origins()](#origins) | Return origin types which would require instance checks. |

------------------------------------------------------------------------


#### origins()


Return origin types which would require instance checks.


Usage

``` python
origins()
```


Provisional custom usage: \`subtype.origins.register(, lambda cls: …)