Body::isArrayValue

protected function isArrayValue($value, $placeholder)
{
	if(!is_string($value) || !is_string($placeholder) || empty($value))
	{
		return false;
	}
	$valueParts = explode('.', $value);
	if(count($valueParts) == 1)
	{
		return false;
	}
	$providerName = $valueParts[0];

	return isset($this->arrayValuePlaceholders[$providerName]);
}