[pro] [Q] introspecting setf expanders

[Didier Verna]

  Hello,

I cannot find a standard way to figure out whether a setf expander has
been defined for a symbol FOO (via either DEFSETF or
DEFINE-SETF-EXPANDER).

Is there one? Otherwise, I would also be happy with an SBCL-only
solution.


Thank you !

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