code: public Categories getCategories(String stateId) throws VoteSmartException, VoteSmartErrorException {
  		return api.query("Rating.getCategories", new ArgMap("stateId", stateId), Categories.class );
  	}
docs: This method dumps categories that contain released ratings according to state.
  Input: stateId (default: 'NA')
  
  @param stateId
  @return {@link Categories}