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
  The type of the actual value.
Parameters
- actual: T
  The actual value to check.
- Optionalmsg: string
  The optional message to include in the error if the assertion fails.
Returns asserts actual is NonNullable<T>
Example: Usage
```
import { assertExists } from "@std/assert";

assertExists("something"); // Doesn't throw
assertExists(undefined); // Throws
```
- Defined in assert/exists.ts:21