CreatePeriodicTimerHandler typedef Null safety

Timer CreatePeriodicTimerHandler (
  1. Zone self,
  2. ZoneDelegate parent,
  3. Zone zone,
  4. Duration period,
  5. void f(
    1. Timer timer
    )
)

Implementation

typedef Timer CreatePeriodicTimerHandler(Zone self, ZoneDelegate parent,
    Zone zone, Duration period, void f(Timer timer));