lib/websockets.js
function (uid, socket) {
    var socks = this.sockets[uid];
    if (!socks) return false;
    return socks.remove(socket);
  }
function (uid, socket) {
    var socks = this.sockets[uid];
    if (!socks) return false;
    return socks.remove(socket);
  }
-> true if the socket was found and removed. false if it wasn't found