docs: public static Map<String, Map<String, String>> merge(
              final Map<String, Map<String, String>> targetContext,
              final Map<String, Map<String, String>> newContext
      )
      {
  
          final HashMap<String, Map<String, String>> result = deepCopy(targetContext);
          for (final Map.Entry<String, Map<String, String>> entry : newContext.entrySet()) {
              if (!targetContext.containsKey(entry.getKey())) {
                  result.put(entry.getKey(), new HashMap<>());
              } else {
                  result.put(entry.getKey(), new HashMap<>(targetContext.get(entry.getKey())));
              }
              result.get(entry.getKey()).putAll(entry.getValue());
          }
          return result;
      }