}
  TF_Buffer* ret = TF_NewBuffer();
  TF_CHECK_OK(MessageToBuffer(options, ret));
  return ret;
}

const char* TF_GraphDebugString(TF_Graph* graph, size_t* len) {
  tensorflow::mutex_lock c(graph->mu);
  const auto& debug_str = graph->graph.ToGraphDefDebug().DebugString();
  *len = debug_str.size();
  char* ret = static_cast<char*>(malloc(*len + 1));

        if (serverChallenge == null) {
            ret.append("null");
        } else {
            ret.append(Hexdump.toHexString(serverChallenge, 0, serverChallenge.length * 2));
        }
        ret.append(",signingKey=");
        if (signingKey == null) {
            ret.append("null");
        } else {
            ret.append(Hexdump.toHexString(signingKey, 0, signingKey.length * 2));
        }

        StringBuilder ret = new StringBuilder().append(this.proto).append(":").append(this.server).append("[").append(this.endpoint);
        if (this.options != null) {
            for (final Entry<String, Object> entry : this.options.entrySet()) {
                ret.append(",").append(entry.getKey()).append("=").append(entry.getValue());
            }
        }
        ret.append("]");
        return ret.toString();

        if (this.serverChallenge == null) {
            ret.append("null");
        } else {
            ret.append(Hexdump.toHexString(this.serverChallenge));
        }
        ret.append(",signingKey=");
        if (this.masterKey == null) {
            ret.append("null");
        } else {
            ret.append(Hexdump.toHexString(this.masterKey));
        }
        ret.append("]");
        return ret.toString();
    }

    @Override
    public String toString() {
        StringBuilder ret = new StringBuilder("SecurityDescriptor:\n");
        if (aces != null) {
            for (final ACE element : aces) {
                ret.append(element.toString()).append("\n");
            }
        } else {
            ret.append("NULL");
        }
        return ret.toString();
    }

    @Override
    public String toString() {
        StringBuilder ret = new StringBuilder("SecurityDescriptor:\n");
        if (this.aces != null) {
            for (final ACE element : this.aces) {
                ret.append(element.toString()).append("\n");
            }
        } else {
            ret.append("NULL");
        }
        return ret.toString();
    }

     */
    @Override
    public String toString() {
        StringBuilder ret = new StringBuilder();
        for (final byte element : this.b) {
            final int n = element & 0xff;
            if (n <= 0x0f) {
                ret.append("0");
            }
            ret.append(Integer.toHexString(n));
        }
        return ret.toString();
    }

    public String toString() {
        StringBuilder ret = new StringBuilder().append(proto).append(":").append(server).append("[").append(endpoint);
        if (options != null) {
            final Iterator iter = options.keySet().iterator();
            while (iter.hasNext()) {
                final Object key = iter.next();
                final Object val = options.get(key);
                ret.append(",").append(key).append("=").append(val);

		{"192.168.1.0", true},
		{"[2001:3984:3989::20%eth0]:9000", true},
	}

	for _, testCase := range testCases {
		ret := isHostIP(testCase.args)
		if testCase.expectedResult != ret {
			t.Fatalf("expected: %v , got: %v", testCase.expectedResult, ret)
		}
	}

     */
    @Override
    public String toString() {
        StringBuilder ret = new StringBuilder("S-").append(this.revision & 0xFF).append("-");

        if (this.identifier_authority[0] != (byte) 0 || this.identifier_authority[1] != (byte) 0) {
            ret.append("0x");
            ret.append(Hexdump.toHexString(this.identifier_authority, 0, 6));
        } else {
            long shift = 0;