[FLOW3-general] Translate label in Controller using translateById

[Rayuth You (Yuth)]

Hi list,

Using FLOW3 1.1.0-dev and I got some problems with using translate label 
in Controller.

Declare:
/**
  * @var \TYPO3\FLOW3\I18n\Translator
  * @FLOW3\Inject
  */
protected $translator;

Call:
$this->translator->translateById('labelId');

Translate:
<trans-unit id="labelId">
   <source>What to be showed</source>
</trans-unit>

Problem:
The result should be 'What to be showed', but it shows 'labelId'.

What did I code something wrong? Does anyone have a hint?

Kind regards,
Rayuth
-- 
Rayuth You
Web Developer

M: +855 11 262 078
E: rayuth at typo3cambodia.org

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