What to use after #'define-package is now obsolete?

[Chen Zhaoyang]

Dear Friends,

It seems that #'define-package is now obsolete (or has been for a while,
https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=ade7a212a882540178d9504e7e0bd3be3bf1fd41):

    (defun define-package ( _name-string _version-string
                            &optional _docstring _requirements
                            &rest _extra-properties)
      "[...]"
      (declare (obsolete nil "29.1") (indent defun))
      (error "Don't call me!"))

Does that mean from now on we just use the constructor
#'package-desc-create in `foobar-pkg.el' files?

-- 
Chen Zhaoyang <zc23@illinois.edu>