Hello,

I am migrating a project from Symfony 2.8 to 3.0

In the process, I saw I had to change the Null constraint to IsNull for forward compatibility with PHP 7. So I thought it would be obvious to also rename NotNull to IsNotNull. But I see that NotNull was kept intact.

Would it make sense to change NotNull to IsNotNull for consistency ? Is there a specific reason why maybe this hasn't been done as part of #14228 ?

Thanks for your help,
Best regards