[pro] Meaning of "inline" when applied to a generic function?

Hello CL pros, I am trying to figure out the meaning of the inline declaration when the so qualified function happens to be a generic function. As in: (declaim (inline foo)) (defgeneric foo (a b)) What can be expected of a compiler when it then faces a call to foo while the above is in effect? Is this an obvious no-op or did some find something useful to do in such a context? Thanks for your help, JCB