@org.junit.runners.ParameterizedWithName.ParametersToString
 public static String parametersToString(Configuration config) {
   return TestWithMultipleConfigurations.parametersToString(config);
 }
 @org.junit.runners.Parameterized.Parameters
 public static Collection<Object[]> data() {
   return TestWithMultipleConfigurations.data();
 }