code: @GwtIncompatible("incompatible method")
    public static void isInstanceOf(final Class<?> type, @Nullable final Object obj) {
      Assert.isInstanceOf(type, obj, "");
    }
docs: Assert that the provided object is an instance of the provided class.
  
  <pre class="code">
  Assert.instanceOf(Foo.class, foo);
  </pre>
  
  @param type the type to check against
  @param obj the object to check
  @throws IllegalArgumentException if the object is not an instance of type