To be called when a Child model is created by Efl.Model.children_slice_get by the one creating the child object.
This function is used to properly define the lifecycle of the new Child Model object and make sure that once it has 0 ref except its parent Model, it will be destroyed. This function should only be called once per child. It is useful for Efl.Model who have a lot of children and shouldn't keep more than what is used in memory.
void efl_loop_model_volatile_make(Eo *obj);