Trim array with wp_array_slice_assoc function

$array = array(0 => 'a', 1 => 'b', 2 => 'c', 3 => 'd', 4 => 'e', 5 => 'f');
$keys = array(2,5);
print_r(wp_array_slice_assoc($array, $keys)); //  Array ( [2] => c [5] => f )