Function assertExists

assertExists<T>(actual, msg?): asserts actual is NonNullable<T>
Make an assertion that actual is not null or undefined. If not then throw.
Type Parameters
- T
Parameters
- actual: T
- Optional msg: string
Returns asserts actual is NonNullable<T>
Since
24.7.0

Example
```
import { assertExists } from "assert";

assertExists("something"); // Doesn't throw
assertExists(undefined); // Throws
```