Static methods do not depend on an object instance, but instead
operate on a class. You can create a static method by using
the subclass specializer with cl-defmethod:
(cl-defmethod make-instance ((class (subclass mychild)) &rest args)
(let ((new (cl-call-next-method)))
(push new all-my-children)
new))
The argument of a static method will be a class rather than an object.
Use the functions oref-default or oset-default which
will work on a class.
A class’s make-instance method is defined as a static
method.
Note: The subclass specializer is unique to EIEIO.