code: public SolutionDescriptor buildSolutionDescriptor(SolverConfigContext configContext, ScoreDefinition deprecatedScoreDefinition) {
          ClassLoader[] classLoaders;
          if (configContext.getClassLoader() != null) {
              classLoaders = new ClassLoader[] {configContext.getClassLoader()};
          } else if (configContext.getKieContainer() != null) {
              classLoaders = new ClassLoader[] {configContext.getKieContainer().getClassLoader()};
              ReflectionsKieVfsUrlType.register(configContext.getKieContainer());
          } else {
              classLoaders = new ClassLoader[0];
          }
          ConfigurationBuilder builder = new ConfigurationBuilder();
          if (!ConfigUtils.isEmptyCollection(packageIncludeList)) {
              FilterBuilder filterBuilder = new FilterBuilder();
              for (String packageInclude : packageIncludeList) {
                  if (StringUtils.isEmpty(packageInclude)) {
                      throw new IllegalArgumentException("The scanAnnotatedClasses (" + this
                              + ") has a packageInclude (" + packageInclude
                              + ") that is empty or null. Remove it or fill it in.");
                  }
                  builder.addUrls(ReflectionsWorkaroundClasspathHelper.forPackage(packageInclude, classLoaders));
                  filterBuilder.includePackage(packageInclude);
              }
              builder.filterInputsBy(filterBuilder);
          } else {
              builder.addUrls(ReflectionsWorkaroundClasspathHelper.forPackage("", classLoaders));
          }
          builder.setClassLoaders(classLoaders);
          Reflections reflections = new Reflections(builder);
          Class<?> solutionClass = loadSolutionClass(reflections);
          List<Class<?>> entityClassList = loadEntityClassList(reflections);
          return SolutionDescriptor.buildSolutionDescriptor(solutionClass, entityClassList, deprecatedScoreDefinition);
      }
docs: ************************************************************************