docs: public JsonNode callStaticMethod(final String fqn, final String method, final ArrayNode args) {
          ObjectNode req = makeRequest("sinvoke");
          req.put("fqn", fqn);
          req.put("method", method);
          req.set("args", args);
          JsonNode resp = this.runtime.requestResponse(req);
          return resp.get("result");
      }