Symfony\Component\Validator\ExecutionContext::setGroup PHP Method

    public function setGroup($group)
    {
        $this->group = $group;
    }

 public function validateOne(ExecutionContext $context)
 {
     $context->setCurrentClass('Foo');
     $context->setCurrentProperty('bar');
     $context->setGroup('mygroup');
     $context->setPropertyPath('foo.bar');
     $context->addViolation('My message', array('parameter'), 'invalidValue');
 }