code: public function get($strKey)
  	{
  		// Map the referer (see #281)
  		if (\in_array($strKey, $this->mappedKeys))
  		{
  			return $this->session->get($strKey);
  		}
  
  		return $this->sessionBag->get($strKey);
  	}
docs: Return a session variable
  
  @param string $strKey The variable name
  
  @return mixed The variable value