STRING-UTILS> (ql:quickload :fset)
 To load "fset":
   Load 1 ASDF system:
     fset
 ; Loading "fset"
 
 (:FSET)
 STRING-UTILS> (fset:map (:a 1) (:b 2))
 #{| (:A 1) (:B 2) |}
 STRING-UTILS> (setf *readtable* fset::*fset-rereading-readtable*)
 #<NAMED-READTABLE :CURRENT {101DBC49A3}>
 STRING-UTILS> #{| (:a 1) (:b 2) |}
 #{| (:A 1) (:B 2) |}
 STRING-UTILS>