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BSD-3-Clause licensed by Adrian Hey
Maintained by Adrian Hey http://homepages.nildram.co.uk/~ahey/em.png
A comprehensive and efficient implementation of AVL trees. The raw AVL
API has been designed with efficiency and generality in mind, not elagance or
safety. It contains all the stuff you really don't want to write yourself if you
can avoid it. This library may be useful for rolling your own Sets, Maps, Sequences,
Queues (for example).