docs: public static <T> TypeInformation<T> POJO(Class<T> pojoClass) {
  		final TypeInformation<T> ti = TypeExtractor.createTypeInfo(pojoClass);
  		if (ti instanceof PojoTypeInfo) {
  			return ti;
  		}
  		throw new InvalidTypesException("POJO type expected but was: " + ti);
  	}