`method top : Js_of_ocaml__.Js.number_t Js_of_ocaml__.Js.readonly_prop`
`method right : Js_of_ocaml__.Js.number_t Js_of_ocaml__.Js.readonly_prop`
`method bottom : Js_of_ocaml__.Js.number_t Js_of_ocaml__.Js.readonly_prop`
`method left : Js_of_ocaml__.Js.number_t Js_of_ocaml__.Js.readonly_prop`
`method width : Js_of_ocaml__.Js.number_t Js_of_ocaml__.Js.optdef Js_of_ocaml__.Js.readonly_prop`
`method height : Js_of_ocaml__.Js.number_t Js_of_ocaml__.Js.optdef Js_of_ocaml__.Js.readonly_prop`