docs: private String toJSONString() {
          JSONStringer js = new JSONStringer();
          try {
              js.object();
              for (Map.Entry<Integer, Integer> entry : m_tokensMap.get().entrySet()) {
                  js.key(entry.getKey().toString()).value(entry.getValue());
              }
              js.endObject();
          } catch (JSONException e) {
              throw new RuntimeException("Failed to serialize Hashinator Configuration to JSON.", e);
          }
          return js.toString();
      }