Subflow flow.$parent with env. variable as path possible?

General
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Im wondering if it is somehow possible to save a variable from within a subflow and change node to a dynamic path like:
flow.$parent.$env('Device Name').temperature or simmilar.
to get a flow variable stored in the path of mydevicename.temperature

I found out how to do it in a function node (see below if you are searching for that) but was wondering if escapeing $ inside a change node is possible...

Function node solution:
flow.set("$parent."+env.get('Device Name')+".temperature", msg.payload);

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