deps/v8/src/debug/debug.js
function scriptById(scriptId) {
  var scripts = Debug.scripts();
  for (var script of scripts) {
    if (script.id == scriptId) return script;
  }
  return UNDEFINED;
}
function scriptById(scriptId) {
  var scripts = Debug.scripts();
  for (var script of scripts) {
    if (script.id == scriptId) return script;
  }
  return UNDEFINED;
}
Get a specific script currently loaded. This is based on scanning the heap. TODO(clemensh): Create a runtime function for this.