Get current global sequence number

import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.core.Response;
​
Client client = ClientBuilder.newClient();
URI apiRoot = URI.create("https://api.serialized.io");
​
Response response = client.target(apiRoot)
    .path("feeds")
    .path("_all")
    .request()
    .header("Serialized-Access-Key", "<YOUR_ACCESS_KEY>")
    .header("Serialized-Secret-Access-Key", "<YOUR_SECRET_ACCESS_KEY>")
    .head();
​
String globalSequenceNumber = (String) response.getHeaders()
    .getFirst("Serialized-SequenceNumber-Current");

using RestSharp;
using System;
​
var client = new RestClient("https://api.serialized.io");
​
var request = new RestRequest("feeds/_all")
   .AddHeader("Serialized-Access-Key", "<YOUR_ACCESS_KEY>")
   .AddHeader("Serialized-Secret-Access-Key", "<YOUR_SECRET_ACCESS_KEY>");
​
var aggregateResponse = client.Head(request);

const axios = require("axios");
​
const client = axios.create({
  baseURL: "https://api.serialized.io",
  headers: {"Serialized-Access-Key": "<YOUR_ACCESS_KEY>"},
  headers: {"Serialized-Secret-Access-Key": "<YOUR_SECRET_ACCESS_KEY>"}
});
​
client.head("feeds/_all")
    .then(function (response) {
      // Handle response
    })
    .catch(function (error) {
      // Handle error
    });