method append : Js_of_ocaml__.Js.js_string Js_of_ocaml__.Js.t ->
Js_of_ocaml__.Js.js_string Js_of_ocaml__.Js.t ->
unit Js_of_ocaml__.Js.meth
method append_blob : Js_of_ocaml__.Js.js_string Js_of_ocaml__.Js.t ->
Js_of_ocaml__.File.blob Js_of_ocaml__.Js.t ->
unit Js_of_ocaml__.Js.meth