public function testGet()
{
$data = ['a' => 1, 'b' => ['c' => 2, 'd' => ['e' => 3]]];
$this->assertNull(Access::get($data, 'a.b.c'));
$this->assertEquals(1, Access::get($data, 'a'));
$this->assertEquals(3, Access::get($data, 'b.d.e'));
$this->assertEquals('z', Access::get($data, 'a.b.c', 'z'));
}