@Override
      public void beforeVfsChange() {
        CollectedEvents collected;
        //noinspection SynchronizeOnThis
        synchronized (VirtualFilePointerManagerImpl.this) {
          collected = myCollectedEvents;
          if (collected.startModCount == myPointerSetModCount) {
            incModificationCount();
          }
          else {
            myCollectedEvents = collected = collectEvents(events);
          }
        }

        for (EventDescriptor descriptor : collected.eventList) {
          descriptor.fireBefore();
        }

        assertConsistency();
      }
@Override
      public void beforeVfsChange()