/**
* @return This method returns a mapping of all bindings in this activation record and others
* higher up the static chain, excluding the top (end) activation record. This value should
* not be viewed as a representative collection of bindings -- this only contains the
* extensions to the activation record. This is useful if you'd like to serialize the
* activation record but leave out all the huge values (like sets, dags) that every other node
* can independently construct.
*/
protected HashMap<String, Value> extensions() {
HashMap<String, Value> belowset = _previous.extensions();
belowset.putAll(_mappings);
return belowset;
}
