Module Chartjs.Stepped_line
val _false : t Js_of_ocaml.Js.tNo Step Interpolation.
val _true : t Js_of_ocaml.Js.tStep-before Interpolation (same as
before).
val before : t Js_of_ocaml.Js.tStep-before Interpolation.
val after : t Js_of_ocaml.Js.tStep-after Interpolation.
val middle : t Js_of_ocaml.Js.tStep-middle Interpolation.