docs: public synchronized String getSubDomain()
  	{
  		if(m_imageUrlSubdomains==null || m_imageUrlSubdomains.length<=0) {
  			return null;
  		}
  
  		final String result = m_imageUrlSubdomains[m_subdomainsCounter];
  		if(m_subdomainsCounter<m_imageUrlSubdomains.length-1) {
  			m_subdomainsCounter++;
  		} else {
  			m_subdomainsCounter=0;
  		}
  
  		return result;
  	}