## Hierarchy For Package org.apache.tools.ant.util.optional

Package Hierarchies:
  All Packages

## Class Hierarchy

- class java.lang.Object
  - class java.lang.SecurityManager
    - class org.apache.tools.ant.util.optional.NoExitSecurityManager
  - class org.apache.tools.ant.util.WeakishReference
    - class org.apache.tools.ant.util.optional.WeakishReference12

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