def value2html(self, ar, v, **cellattrs):
        if self.field.primary_key:
            url = ar.renderer.pk2url(ar, v)
            if url is not None:
                return E.td(E.a(self.format_value(
                    ar, v), href=url), **cellattrs)
        return E.td(self.format_value(ar, v), **cellattrs)
Iterator that exposes all collisions between known objects.
dataset/ETHPy150Open lsaffre/lino/lino/modlib/extjs/elems.py/FieldElement.value2html--crossover with--dataset/ETHPy150Open los-cocos/cocos/cocos/collision_model.py/CollisionManager.iter_all_collisions