docs: private static boolean validateMongoConnection(ExternalTestService mongoService) {
          String method = "validateMongoConnection";
          MongoClient mongoClient = null;
  
          String host = mongoService.getAddress();
          int port = mongoService.getPort();
  
          File trustStore = null;
  
          MongoClientOptions.Builder optionsBuilder = new MongoClientOptions.Builder().connectTimeout(30000);
          try {
              trustStore = File.createTempFile("mongoTrustStore", "jks");
              Map<String, String> serviceProperties = mongoService.getProperties();
  
              String password = serviceProperties.get(TEST_USERNAME + "_password"); // will be null if there's no auth for this server
              SSLSocketFactory sslSocketFactory = null;
  
              try {
                  mongoService.writePropertyAsFile("ca_truststore", trustStore);
                  sslSocketFactory = getSocketFactory(trustStore);
              } catch (IllegalStateException e) {
                  // Ignore exception thrown if truststore is not present for this server
                  // This indicates that we are not using SSL for this server and sslSocketFactory will be null
              }
  
              if (sslSocketFactory != null) {
                  optionsBuilder.socketFactory(sslSocketFactory);
              }
  
              MongoClientOptions clientOptions = optionsBuilder.build();
              List<MongoCredential> credentials = Collections.emptyList();
              if (password != null) {
                  MongoCredential credential = MongoCredential.createCredential(TEST_USERNAME, TEST_DATABASE, password.toCharArray());
                  credentials = Collections.singletonList(credential);
              }
  
              Log.info(c, method,
                       "Attempting to contact server " + host + ":" + port + " with password " + (password != null ? "set" : "not set") + " and truststore "
                                  + (sslSocketFactory != null ? "set" : "not set"));
              mongoClient = new MongoClient(new ServerAddress(host, port), credentials, clientOptions);
              mongoClient.getDB("default").getCollectionNames();
              mongoClient.close();
          } catch (Exception e) {
              Log.info(c, method, "Couldn't create a connection to " + mongoService.getServiceName() + " on " + mongoService.getAddress() + ". " + e.toString());
              mongoService.reportUnhealthy("Couldn't connect to server. Exception: " + e.toString());
              return false;
          } finally {
              if (trustStore != null) {
                  trustStore.delete();
              }
          }
          return true;
      }