/**
  * Verify bahvior of __call() for entity that is invalid.
  *
  * @test
  * @covers ::__call
  *
  * @return void
  */
 public function callInvalidEntity()
 {
     $client = new Client('not under test', 'not under test', new Assets\ErrorAdapter());
     $result = $client->batman(1);
     $this->assertNull($result);
 }