If I have two templates/macros `dsl` and `options` and I want to ensure that
the `options` one can be used only in an englobing `dsl` one, is it possible?
dsl:
options:
# This construct is correct
...
options:
# This one is not
...
options:
dsl:
# Neither this one...
...
Run
I've tried having the `dsl` declare a variable and test its presence in
`options` with
[declaredInScope](https://nim-lang.org/docs/system.html#declaredInScope%2Cuntyped)
or [compiles](https://nim-lang.org/docs/system.html#compiles%2Cuntyped), but I
can't get it right. How would you do it?
