Summary:
@public
EventQueue is a queue of events that synchronizing event dispatching with given Event Beat.
The only difference between UnbatchedEventQueue and BatchedEventQueue is that UnbatchedEventQueue `induce` an Event Beat right after enqueing an event.
Reviewed By: mdvacca
Differential Revision: D8886225
fbshipit-source-id: fedba6fdff2ecb6f3c615cea09b5fdaa58890479
Valentin Shergin