`sig val mk : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.class_type_desc -> Parsetree.class_type val attr : Parsetree.class_type -> Parsetree.attribute -> Parsetree.class_type val constr : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Ast_helper.lid -> Parsetree.core_type list -> Parsetree.class_type val signature : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.class_signature -> Parsetree.class_type val arrow : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Asttypes.arg_label -> Parsetree.core_type -> Parsetree.class_type -> Parsetree.class_type val extension : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.extension -> Parsetree.class_type end`