clojure.tools.analyzer.env
*env*
Global env atom
Required options:
* :namespaces an atom containing a map from namespace symbol to namespace map,
the namespace map contains at least the following keys:
** :mappings a map of mappings of the namespace, symbol to var/class
** :aliases a map of the aliases of the namespace, symbol to symbol
** :ns a symbol representing the namespace
(deref-env)
Returns the value of the current global env if bound, otherwise
throws an exception.