sig
val genr_test_preamble :
Tgenr_base.module_name -> Tgenr_base.seed -> Code.structure_item list
val genr_type_test :
Tgenr_base.seed ->
Tgenr_base.num_tests ->
Tgenr_base.nesting_depth ->
(string * Parsetree.type_declaration) list -> Code.structure_item list
end