ArcMap
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Arc Map is designed to allow a HashMap of Arc\<Mutex\<T>> to be stored in such a way that elements can be accessed without the need to lock the whole Map while you have access to them.

**Contributions Welcome**


### changes in v0.1.3

changed &mut self to &self, in three main methods.  making it much easier to use as part of another object.  

### changes in v0.1.2

Switched main channel to SyncSender, for sync in parents