public function testMakeValuePairs()
{
$test = [['id' => 1, 'value' => 1], ['id' => 2, 'value' => 2]];
$this->assertEquals([1 => 1, 2 => 2], Arr::makeValuePairs($test, 'id', 'value'));
$this->assertEquals([0 => 1, 1 => 2], Arr::makeValuePairs($test, '', 'value'));
}