Class type PerformanceObserver.performanceObserver

method observe : performanceObserverInit Js_of_ocaml__Js.t -> unit Js_of_ocaml__Js.meth
method disconnect : unit Js_of_ocaml__Js.meth
method takeRecords : performanceEntry Js_of_ocaml__Js.t Js_of_ocaml__Js.js_array Js_of_ocaml__Js.t Js_of_ocaml__Js.meth