1. @Deprecated("Internal Use Only")
void argsSafeForTypedInterop(Iterable args)

Check that that if any elements of args are Function it is safe to pass to JavaScript. To make a function safe, call allowInterop or allowInteropCaptureThis.

Source 

@Deprecated("Internal Use Only")
void argsSafeForTypedInterop(Iterable args) {
  for (var arg in args) {
    safeForTypedInterop(arg);
  }
}