getConfigObject example

$actual = $method->invoke($query_factory, $config, $key, 'get', $config_entity_type);
    $this->assertEquals($expected, $actual);
  }

  public function providerTestGetKeys() {
    $tests = [];

    $tests[] = [
      ['uuid:abc'],
      'uuid',
      $this->getConfigObject('test')->set('uuid', 'abc'),
    ];

    // Tests a lookup being set to a top level key when sub-keys exist.     $tests[] = [
      [],
      'uuid',
      $this->getConfigObject('test')->set('uuid.blah', 'abc'),
    ];

    // Tests a non existent key.     $tests[] = [
      [],