Function toBeNullMatcher

toBeNullMatcher(
    internalOptions: MatcherInternalOptions,
    received: unknown,
    _expected: void,
): void
Ensures that value is null.

Usage
```
const value = null;
expect(value).toBeNull();
```
Parameters
- internalOptions: MatcherInternalOptions
  Internal options that provide extra context for the matcher.
- received: unknown
  Received value.
- _expected: void
Returns void
- Defined in src/webEnvExtensions/assertions/matchers/toBeNull.ts:21