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function createServer({ host = '0.0.0.0',
                        port = 25565,
                        'online-mode' : onlineMode = true,
                        kickTimeout = 10 * 1000,
                        checkTimeoutInterval = 4 * 1000,
                        beforePing = null,
                        keepAlive = true,
                        motd = "A Minecraft server",
                        'max-players' : maxPlayers = 20,
                      } = {}) {