This approach is not usable in most garbage collected languages – notably tracing garbage collectors or more advanced reference counting – due to finalization being non-deterministic, and sometimes not occurring at all. That is, it is difficult to define (or determine) when or if a finalizer method might be called; this is commonly known as the finalizer problem. Java and other GC'd languages frequently use manual management for scarce system resources "besides" memory via the dispose pattern: any object which manages resources is expected to implement the codice_7 method, which releases any such resources and marks the object as inactive. Programmers are expected to invoke codice_7 manually as appropriate to prevent "leaking" of scarce graphics resources. Depending on the codice_9 method (how Java implements finalizers) to release graphics resources is widely viewed as poor programming practice among Java programmers, and similarly the analogous codice_10 method in Python cannot be relied on for releasing resources. For stack resources (resources acquired and released within a single block of code), this can be automated by various language constructs, such as Python's codice_11, C#'s codice_12 or Java's codice_13-with-resources.