docs: static void addClassContainment(final List<SimpleEntry<String, String>> classContainmentEntries,
              final Map<String, ClassInfo> classNameToClassInfo) {
          for (final SimpleEntry<String, String> ent : classContainmentEntries) {
              final String innerClassName = ent.getKey();
              final ClassInfo innerClassInfo = ClassInfo.getOrCreateClassInfo(innerClassName,
                      /* classModifiers = */ 0, classNameToClassInfo);
              final String outerClassName = ent.getValue();
              final ClassInfo outerClassInfo = ClassInfo.getOrCreateClassInfo(outerClassName,
                      /* classModifiers = */ 0, classNameToClassInfo);
              innerClassInfo.addRelatedClass(RelType.CONTAINED_WITHIN_OUTER_CLASS, outerClassInfo);
              outerClassInfo.addRelatedClass(RelType.CONTAINS_INNER_CLASS, innerClassInfo);
          }
      }