# Hierarchy For Package org.python.modules._weakref

Package Hierarchies:

- All Packages

## Class Hierarchy

- java.lang.Object
  - org.python.core.PyObject (implements java.io.Serializable)
    - org.python.modules._weakref.AbstractReference (implements org.python.core.Traverseproc)
      - org.python.modules._weakref.ProxyType
        - org.python.modules._weakref.CallableProxyType
      - org.python.modules._weakref.ReferenceType
        - org.python.modules._weakref.ReferenceTypeDerived (implements org.python.core.finalization.FinalizablePyObjectDerived, org.python.core.Slotted, org.python.core.TraverseprocDerived)
  - java.lang.ref.Reference<T>
    - java.lang.ref.WeakReference<T>
      - org.python.modules._weakref.GlobalRef (implements org.python.modules._weakref.ReferenceBackend)
  - org.python.modules._weakref.WeakrefModule (implements org.python.core.ClassDictInit)

## Interface Hierarchy

- org.python.modules._weakref.ReferenceBackend
- org.python.modules._weakref.ReferenceBackendFactory