private function _checkAliases($text) {
		if ($this->_isActive('checkAliases')) {
			$key = strtolower($text);
			if (array_key_exists($key, $this->_aliasedFunctions)) {
				$msg = $this->_getMessage('ALIASED_FUNCTION', $this->_aliasedFunctions[$key]['old'], $this->_aliasedFunctions[$key]['new']);
				$this->_writeError('checkAliases', $msg);
			}
		}
	}