void function ( ) { }
called when reference counting hits 0 . by default this method does nothing , but extensions can override to e.g. release resources attached to object that is managed by this class . concode_field_sep AtomicInteger refCount concode_elem_sep T object concode_field_sep void decRef concode_elem_sep T get concode_elem_sep int getRefCount concode_elem_sep void incRef