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create() function is used to create a new object, that
initialize verb, if any, is called with no arguments. The call
is simply skipped if no such verb is defined on the object.
Symmetrically, just before the
recycle() function actually destroys an
object, the object's
recycle verb, if any, is called with no arguments.
Again, the call is simply skipped if no such verb is defined on the object.
recycle() check for the existence of an
ownership_quota property on the owner of the newly-created or -destroyed
object. If such a property exists and its value is an integer, then it is
treated as a quota on object ownership. Otherwise, the following two
paragraphs do not apply.
create() function checks whether or not the quota is positive; if
so, it is reduced by one and stored back into the
property on the owner. If the quota is zero or negative, the quota is
considered to be exhausted and
recycle() function increases the quota by one and stores it back
ownership_quota property on the owner.