$this->assertNotSame( $bar, $newBar, 'don\'t salvage if callbacks differ' );
// the new factory doesn't have quux defined, so the quux instance should not be salvaged
$this->assertNotSame( $bar, $newBar, 'don\'t salvage if callbacks differ' );
// the new factory doesn't have quux defined, so the quux instance should not be salvaged