private function normToClient($value)
{
if (!$this->clientTransformers) {
// Scalar values should always be converted to strings to
// facilitate differentiation between empty ("") and zero (0).
return null === $value || is_scalar($value) ? (string) $value : $value;
}
foreach ($this->clientTransformers as $transformer) {
$value = $transformer->transform($value);
}
return $value;
}