src/HOL/SET-Protocol/PublicSET.thy

 end
 *}
 
 method_setup possibility = {*
     Method.ctxt_args (fn ctxt =>
-        Method.SIMPLE_METHOD (PublicSET.gen_possibility_tac (local_simpset_of ctxt))) *}
+        SIMPLE_METHOD (PublicSET.gen_possibility_tac (local_simpset_of ctxt))) *}
     "for proving possibility theorems"
 
 
 
 subsection{*Specialized Rewriting for Theorems About @{term analz} and Image*}