The interface efl_part_get should not be directly called from C, but the efl_part
wrapper should. It rely on efl_noref to properly destroy the object. Binding can
control the lifecycle of the reference the way they want by either calling the
wrapper or efl_part_get directly. It also means that the ugly ___efl_auto_unref_set
doesn't need to be exposed outside of EFL anymore.
Differential Revision: https://phab.enlightenment.org/D6098
Summary:
For now, how to check whether a widget is legacy or not
is to check flags in private data or static flag, which is set
during elm_legacy_add.
If Efl.Ui.Legacy interface is added, it can be easilly checked
by efl_isa(obj, EFL_UI_LEGACY_INTERFACE)
Reviewers: woohyun, jpeg, cedric, Jaehyun_Cho
Subscribers: conr2d, cedric, jpeg
Differential Revision: https://phab.enlightenment.org/D5748