[Help-smalltalk] Listing the variable names defined in a workspace or REPL session

[ZuLuuuuuu]

Hello,

How can one list the variable names defined in a workspace or in a REPL
session?

For example, after executing these commands on terminal:

 $ gst
 GNU Smalltalk ready

 st> foo := 2
 2
 st> bar := 3
 3

I want to get the variable names 'foo' and 'bar' in a collection or
something.

A second question, are there any resources I can learn about such reflecting
capabilities of Smalltalk?

-----
Canol Gökel
--
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