Converting mutable to immutable map

Posted by Jeriho on Stack Overflow See other posts from Stack Overflow or by Jeriho
Published on 2010-05-12T08:22:35Z Indexed on 2010/05/12 14:24 UTC
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private[this]object MMMap extends  HashMap[A, Set[B]] with MultiMap[A, B]

How convert it to immutable?

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