bool shouldScheduleTick

Whether a tick should be scheduled.

If this is true, then calling scheduleTick should succeed.

Reasons why a tick should not be scheduled include:

  • A tick has already been scheduled for the coming frame.
  • The ticker is not active (start has not been called).
  • The ticker is not ticking, e.g. because it is muted (see isTicking).

Source 

@protected
bool get shouldScheduleTick => isTicking && !scheduled;