Function assertIsOptionalSymbol

assertIsOptionalSymbol(
input: unknown,
error?: string | Error,
): asserts input is symbol | undefined
Assert that input is a symbol or undefined.
Parameters
- input: unknown
- error: string | Error = 'input is not an optional symbol'
Returns asserts input is symbol | undefined
Example
```
assertIsOptionalSymbol(Symbol('id')); // does not throw
assertIsOptionalSymbol(undefined); // does not throw
assertIsOptionalSymbol('id'); // throws TypeError: input is not an optional symbol
```
- Defined in src/assertion/assertIsOptionalSymbol.ts:15