docs: public boolean isHealthy(boolean doExtensiveChecks) {
      if (socket.isClosed() || socket.isInputShutdown() || socket.isOutputShutdown()) {
        return false;
      }
  
      if (http2Connection != null) {
        return !http2Connection.isShutdown();
      }
  
      if (doExtensiveChecks) {
        try {
          int readTimeout = socket.getSoTimeout();
          try {
            socket.setSoTimeout(1);
            if (source.exhausted()) {
              return false; // Stream is exhausted; socket is closed.
            }
            return true;
          } finally {
            socket.setSoTimeout(readTimeout);
          }
        } catch (SocketTimeoutException ignored) {
          // Read timed out; socket is good.
        } catch (IOException e) {
          return false; // Couldn't read; socket is closed.
        }
      }
  
      return true;
    }