Function concreteNumUniqueNumericIdGen

concreteNumUniqueNumericIdGen(): UniqueNumericIdCreator
Creates a unique numeric ID generator for concrete numbering instances.

Concrete numbering instances reference abstract numbering definitions and are used to apply numbering to paragraphs. Initial value is 1 because ID 1 is reserved for "default-bullet-numbering".

Returns UniqueNumericIdCreator
A function that generates sequential IDs starting from 2
Example
```
const idGen = concreteNumUniqueNumericIdGen();
const id = idGen(); // Returns 2 (1 is reserved)
```
- Defined in util/convenience-functions.ts:103