run
fun AsyncScheduler.runAtFixedRate(time: TimeUnit, initialDelay: Long, period: Long, task: ScheduledTask.() -> Unit)
fun EntityScheduler.runAtFixedRate(initialDelay: Long, period: Long, retired: () -> Unit, task: ScheduledTask.() -> Unit): ScheduledTask?
fun EntityScheduler.runAtFixedRate(initialDelay: Long, period: Long, task: ScheduledTask.() -> Unit): ScheduledTask?
fun GlobalRegionScheduler.runAtFixedRate(initialDelay: Long, period: Long, task: ScheduledTask.() -> Unit): ScheduledTask