It is hard to justify such code in any serious context.
This is written to be an object method but it effects the object's package namespace not the object.
This is code that should not be applied to mature code since the My::Config module needs be invaded and all the client code needs to be altered to use it. If there is
already a My::Config::import function, it would be
better to change the lexicals to package variables inside My::Config.
If writing new code, such misuse of lexicals is perverse. ... That is the thing I like about it. Ahh.
Be well,
rir
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