if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
}
else {
if(mVisibleFragment instanceof NavigationManagerFragment) {
<BUG>if (!((NavigationManagerFragment)mVisibleFragment).onBackPressed()) {
</BUG>
super.onBackPressed();
}
}

if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
}
