code: public function getMessages( $domain = 'default', $locale = null )
  	{
  		if( $locale === null ) {
  			$locale = $this->getLocale();
  		}
  
  		if( !isset( $this->messages[$domain][$locale] ) ) {
  			$this->loadMessages( $domain, $locale );
  		}
  
  		return $this->messages[$domain][$locale];
  	}
docs: Returns all message strings and translations.
  
  @param string $domain Translation domain
  @param string $locale $locale ISO language name, like "en" or "en_US"
  @return Zend\I18n\Translator\TextDomain Array like TextDomain object