made the getSource() method non-abstract for BC
made the getSource() method non-abstract for BC

twigphp/Twig,twigphp/Twig,gamernetwork/Twig,gamernetwork/Twig,nicolas-grekas/Twig,nicolas-grekas/Twig,gencer/Twig,nicolas-grekas/Twig,nicolas-grekas/Twig,gamernetwork/Twig,twigphp/Twig,nicolas-grekas/Twig,gencer/Twig