java.nio.channels.MembershipKey API

[David M. Lloyd]

Ressurrecting this old thread - I have one additional comment about the 
MembershipKey interface.  Rather than have drop()/isValid(), why not extend 
Channel (or at least Closeable) and have close()/isOpen() instead?  This 
way any code which has a common resource cleanup mechanism based on 
Closeable will be able to clean up MembershipKeys in the same way.

- DML