navigator = new SupportFragmentNavigator(getSupportFragmentManager(), R.id.rootVideoContainer) {
            @Override
            protected Fragment createFragment(String screenKey, Object data) {
                Screens screen = Screens.byName(screenKey);
                if (screen == null)
                    throw new NullPointerException("Screen with " + screenKey + " not found");
                return screen.getNewInstance(SetupVideoSessionRootActivity.this, (Serializable) data);
            }

            @Override
            protected void showSystemMessage(String message) {
                Toast.makeText(SetupVideoSessionRootActivity.this, message, Toast.LENGTH_SHORT).show();
            }

            @Override
            protected void setupFragmentTransactionAnimation(Command command, Fragment currentFragment, Fragment nextFragment, FragmentTransaction fragmentTransaction) {
                super.setupFragmentTransactionAnimation(command, currentFragment, nextFragment, fragmentTransaction);
                if (currentFragment instanceof IPostponedSupportExitFragment) {
                    PostponedExitData sharedElements = ((IPostponedSupportExitFragment) currentFragment).getSharedElements();
                    if (sharedElements != null) {
                        for (PostponedPair postponedPair : sharedElements.getPairs()) {
                            if (postponedPair.isPresented()) {
                                fragmentTransaction.addSharedElement(postponedPair.first, postponedPair.second);
                            }
                        }
                    }
                }
            }

            @Override
            protected void exit() {
                finish();
            }
        };