Function getPOICategories

getPOICategories(params?: POICategoriesParams): Promise<POICategoriesResponse>
Retrieve the list of POI category types supported by the TomTom Search API.

The returned code values (POICategory) serve two purposes:
- Pass to search({ poiCategories }) to filter search results by category.
- Pass to POIsModule.filterCategories() to filter the map's built-in POI icons. Generic parent codes (e.g. 'RESTAURANT') are supported there; overly specific child codes (e.g. 'ITALIAN_RESTAURANT') are not — use a parent or a POICategoryGroup instead.
Results are cached in memory per language. The first call fetches from the API; all subsequent calls — including filtered ones — are served from the cache.
Parameters
- params: POICategoriesParams = {}
  Optional parameters. Uses global TomTomConfig by default.
Returns Promise<POICategoriesResponse>
Example
```
// All categories
const { poiCategories: all } = await getPOICategories();

// Filtered by keyword, merged and deduplicated
const { poiCategories: gyms } = await getPOICategories({ filters: ['gym'] });
gyms.forEach(c => console.log(c.code, c.name, c.childCategoryCodes));
```