let x = Primitive_dict.make [||]
let x = Primitive_dict.make [|("foo", {js|bar|js})|]
let x = Primitive_dict.make [|("foo", {js|bar|js});("bar", {js|baz|js})|]
let baz = {js|foo|js}
let x =
  Primitive_dict.make
    [|("foo", {js|bar|js});("bar", {js|baz|js});("baz", baz)|]