1. protected
void scheduleTick({bool rescheduling: false })

Schedules a tick for the next frame.

This should only be called if shouldScheduleTick is true.

Source 

@protected
void scheduleTick({ bool rescheduling: false }) {
  assert(isTicking);
  assert(!scheduled);
  assert(shouldScheduleTick);
  _animationId = SchedulerBinding.instance.scheduleFrameCallback(_tick, rescheduling: rescheduling);
}