theory Quickcheck_Nesting imports Main begin ML ‹ let open BNF_FP_Def_Sugar open BNF_LFP_Compat val compat_plugin = Plugin_Name.declare_setup \<^binding>‹compat›; fun compat fp_sugars = perhaps (try (datatype_compat (map (fst o dest_Type o #T) fp_sugars))); in Theory.setup (fp_sugars_interpretation compat_plugin compat) end › end