hasCategories method
Check if category has subcategories.
Parameters
- IN categId The category id
Returns
- True if category has subcategories, false otherwise.
Implementation
bool hasCategories(final int categId) {
  final OperationResult resultString = objectMethod(
    pointerId,
    'OverlayInfo',
    'hasCategories',
    args: categId,
  );
  return resultString['result'];
}