is_indexable -> IsIndexable

The former has been deprecated.
See 58586370ba9da63f0dea9adf81be0e481ae6b41a in dune-common.

dune/solvers/common/resize.hh

@@ -41,14 +41,14 @@ void resizeInitialize(Dune::BitSetVector<size, Alloc>& x, const Vector& y, bool
 }
 
 template<class TargetVector, class Vector, class Value,
-  std::enable_if_t<not Dune::is_indexable<TargetVector, std::integral_constant<std::size_t,0> >::value, int> = 0>
+  std::enable_if_t<not Dune::IsIndexable<TargetVector, std::integral_constant<std::size_t,0> >::value, int> = 0>
 void resizeInitialize(TargetVector& x, const Vector& y, const Value& value)
 {
   x = value;
 }
 
 template<class TargetVector, class Vector, class Value,
-  std::enable_if_t<Dune::is_indexable<TargetVector, std::integral_constant<std::size_t,0> >::value, int> = 0>
+  std::enable_if_t<Dune::IsIndexable<TargetVector, std::integral_constant<std::size_t,0> >::value, int> = 0>
 void resizeInitialize(TargetVector& x, const Vector& y, const Value& value)
 {
   namespace H = Dune::Hybrid;