Fix gtest printing

Signed-off-by: Konrad Breitsprecher <Konrad.Breitsprecher@vector.com>

Author: KonradBreitsprecherBkd

SilKit/IntegrationTests/ITest_DynStepSizes.cpp

@@ -7,25 +7,24 @@
 #include <string>
 #include <chrono>
 #include <iostream>
+#include <sstream>
 
 using namespace std::chrono_literals;
 
-namespace std {
 template <typename Rep, typename Period>
 void PrintTo(const std::chrono::duration<Rep, Period>& d, std::ostream* os)
 {
     *os << std::chrono::duration_cast<std::chrono::nanoseconds>(d).count() << "ns";
 }
 template <typename R1, typename P1, typename R2, typename P2>
-inline void PrintTo(const std::pair<std::chrono::duration<R1, P1>, std::chrono::duration<R2, P2>>& p, std::ostream* os)
+void PrintTo(const std::pair<std::chrono::duration<R1, P1>, std::chrono::duration<R2, P2>>& p, std::ostream* os)
 {
     *os << "(";
     PrintTo(p.first, os);
     *os << ", ";
     PrintTo(p.second, os);
     *os << ")";
 }
-} // namespace std
 
 inline std::string ToString(const std::chrono::nanoseconds& ns)
 {