module Opn:sig
..end
val mk : ?loc:Location.t ->
?attrs:Ast_403.Parsetree.attributes ->
?docs:Ast_403.Docstrings.docs ->
?override:Ast_403.Asttypes.override_flag ->
Longident.t Ast_403.Asttypes.loc -> Ast_403.Parsetree.open_description