text: import "x" assert { type: "json" }
  import "foo" assert { "type": "json" };
  import foo from "foo.json" assert { type: "json" };
  import {test} from "foo.json" assert { for: "for" }
  import foo_json from "foo.json" assert { type: "json", hasOwnProperty: "true" };
  import "x" assert
  { type: "json" }
  