TimelineTask.withTaskId constructor

TimelineTask.withTaskId(int taskId)

Create a task with an explicit taskId. This is useful if you are passing a task from one isolate to another.

Implementation 

TimelineTask.withTaskId(int taskId) : _taskId = taskId {
  if (taskId is! int) {
    throw new ArgumentError.value(taskId, 'taskId', 'Must be an int');
  }
}