Function isLString

isLString(string_: string): string_ is `L${number}`
Tests if a string is a LString. Can also be used as a type guard.
Parameters
- string_: string
  The string to test.
Returns string_ is `L${number}`
True if the string is a LString.
Example
```
const property = 'L123';
   if (!isLString(property)) {
       throw new Error('Not a LString');
   }
   WikibaseLexemeSnak.fromData('P6553', property);
```
- Defined in src/utils/guards/strings.ts:59