@RequiresReadLock
    @Nullable DebuggerDfaRunner transform() {
      if (PsiModificationTracker.getInstance(myLarva.myProject).getModificationCount() != myLarva.myStamp) {
        return null;
      }
      return new DebuggerDfaRunner(myLarva, myInfoMap);
    }
@RequiresReadLock
    @Nullable DebuggerDfaRunner transform()