Array ( [1] => Red [2] => Blue [3] => Green )
\App\Color::optionValue(2) => Blue
\App\Color::optionKey('Green') => 3
Array ( [0] => Red [1] => Blue [2] => Green )
Array ( [0] => 1 [1] => 2 [2] => 3 )
Red
2
Array ( [] => Pick one [1] => Red [2] => Blue [3] => Green )
Array ( [-99] => Pick one [1] => Red [2] => Blue [3] => Green )