`method unitType : lengthUnitType Js_of_ocaml__.Js.readonly_prop`
`method value : Js_of_ocaml__.Js.number_t Js_of_ocaml__.Js.prop`
`method valueInSpecifiedUnits : Js_of_ocaml__.Js.number_t Js_of_ocaml__.Js.prop`
`method valueAsString : Js_of_ocaml__.Js.js_string Js_of_ocaml__.Js.t Js_of_ocaml__.Js.prop`
`method newValueSpecifiedUnits : lengthUnitType -> Js_of_ocaml__.Js.number_t -> unit Js_of_ocaml__.Js.meth`
`method convertToSpecifiedUnits : lengthUnitType -> unit Js_of_ocaml__.Js.meth`