[pro] [Q] introspecting setf expanders

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 ! -- Resistance is futile. You will be jazzimilated. Scientific site: http://www.lrde.epita.fr/~didier Music (Jazz) site: http://www.didierverna.com