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