Function assertOrdinaryObject

assertOrdinaryObject<T>(
value: T,
errorMsg?: string,
): asserts value is T & object
Asserts that a value is an ordinary object.

Unlike isOrdinaryObject, this function preserves the existing static type of the variable rather than narrowing it to a generic indexable structure. It accepts plain objects, custom-prototype objects, and ordinary class instances, while rejecting arrays, functions, primitives, and specialized built-in objects.

Use this function when:
```
  - You expect a value to be an ordinary object at runtime, **and**
  - You want to keep its compile-time type intact after validation.
```
Type Parameters
- T
Parameters
- value: T
  The value to validate.
- OptionalerrorMsg: string
  Optional message used for the thrown TypeError.
Returns asserts value is T & object
Example
```
class Options {
  flag?: boolean;
  value?: number;
}

function run(opts: Options) {
  assertOrdinaryObject(opts, `'opts' is not an ordinary object.`);
  opts.value; // `opts` remains typed as `Options`.
}
```
Throws
if the value is not an ordinary object.