public function testSetAndGetOptions()
 {
     $options = new TwigOptionsDefinition();
     $options->set('needs_environment', true);
     $options->set('is_safe', ['html']);
     $more = new TwigOptionsDefinition();
     $more->set('is_safe', []);
     $options->merge($more, false);
     $this->assertSame(['needs_environment' => true, 'is_safe' => ['html']], $options->toArray());
     $options->merge($more);
     $this->assertSame(['needs_environment' => true, 'is_safe' => []], $options->toArray());
 }