/**
* Sends a message
*
* @param integer $number
* @param string $message
* @param string|null $sender
* @param integer|string|null $reference
* @param array|string|null $callbackParams
* @param string|null $callback
*
* @return Receipt
*/
public function send($number, $message, $sender = null, $reference = null, $callbackParams = null, $callback = null)
{
Assertion::integerish($number);
Assert\that($message)->notEmpty()->string();
Assertion::nullOrString($sender);
Assertion::nullOrStringOrInteger($reference);
Assertion::nullOrAllInRangeOrAll($callbackParams, 1, 10);
Assertion::nullOrUrl($callback);
$result = $this->call(compact('number', 'message', 'sender', 'reference', 'callbackParams', 'callback'));
return Receipt::create($result);
}
