Concept definition

template<typename EvaluatorType>
concept mgis::function::T2toT2EvaluatorConcept =  (T2toT21DEvaluatorConcept<EvaluatorType>) ||
                                   (T2toT22DEvaluatorConcept<EvaluatorType>) ||
                                   (T2toT23DEvaluatorConcept<EvaluatorType>)