// An entry can be collected when the value (the ring) isn't referenced any more
// except from the hash table, and when the keys (the base ring and the name)
// are't referenced any more except from the hash table and the ring. Note that
// the ring contains exactly one reference to the base ring and exactly one
// reference to the name (on the property list).
// An entry can be collected when the value (the ring) isn't referenced any more
// except from the hash table, and when the keys (the base ring and the name)
// are't referenced any more except from the hash table and the ring. Note that
// the ring contains exactly one reference to the base ring and exactly one
// reference to the name (on the property list).