public static function createFromArray(array $newEllipsoid)
{
if (!isset($newEllipsoid['name']) || !isset($newEllipsoid['a']) || !isset($newEllipsoid['invF']) || 3 !== count($newEllipsoid)) {
throw new InvalidArgumentException('Ellipsoid arrays should contain `name`, `a` and `invF` keys !');
}
return new self($newEllipsoid['name'], $newEllipsoid['a'], $newEllipsoid['invF']);
}