System.Linq.CachedReflectionInfo.GroupBy_TSource_TKey_TElement_3 C# (CSharp) Метод

        public static MethodInfo GroupBy_TSource_TKey_TElement_3(Type TSource, Type TKey, Type TElement) =>
             (s_GroupBy_TSource_TKey_TElement_3 ??
             (s_GroupBy_TSource_TKey_TElement_3 = new Func<IQueryable<object>, Expression<Func<object, object>>, Expression<Func<object, object>>, IQueryable<IGrouping<object, object>>>(Queryable.GroupBy).GetMethodInfo().GetGenericMethodDefinition()))
              .MakeGenericMethod(TSource, TKey, TElement);