docs: public Connection getConnection(String name) throws ExecutionException {
          Connection connection = null;
          synchronized (connections) {
              if (connections.containsKey(name)) {
                  connection = connections.get(name);
              } else {
  
                  String msg = "The connection [" + name + "] does not exist";
                  logger.error(msg);
                  throw new ExecutionException(msg);
              }
          }
          return connection;
      }