Function setCategoryVisibility

setCategoryVisibility(params): void
JMap.Layer.Thematic.setCategoryVisibility

Shows or hides a specific layer thematic category on the map.
Parameters
- params: JLayerThematicSetCategoryVisibilityParams
  a JLayerThematicSetCategoryVisibilityParams object
Returns void
Throws
Error if layer or thematic is not found, or if an invalid param is provided

Example
```
// Hide the first category of thematic id=3 of layer id=7
JMap.Layer.Thematic.setCategoryVisibility({
   layerId: 7,
   thematicId: 3,
   categoryIndex: 0,
   visibility: false
 })
```