public function testGettingKeys()
 {
     $t = TreeStore::create($this->data, 'Role');
     static::assertEquals('1.0.0', $t->get('version', 'structure'));
     static::assertEquals('ROLE_ROOT', $t->get('data', 1, 'name'));
     static::assertNull($t->get('does', 'not', 'exist'));
 }
 /**
  * @internal
  *
  * @return string
  */
 public function getTreeStore()
 {
     return TreeStore::create((array) $this->data, (string) $this->name);
 }