Binding Events in Parent Form

MyAbstractType.php

<?php

abstract class MyAbstractType extends AbstractType
{
    /** CODE */
}

MyFormType.php

<?php

class MyFormType extends MyAbstractType
{

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add();
        ...
    }

}

Why don't you use the form's native inheritance mechanism? I.e., let both types implementAbstractType and define getParent() in MyFormType to return the name of MyAbstractType (defined in its getName()). This would solve your problem.

*extend, not implement

Thanks, that is an idea.

Relying on the getParent still leaves me with the possibility of human error if the dev forgets to do that.
But since this is a service I may be able to do some smart juggling and force this to be called by the app itself.

Will try it.