if (self::isUnderscoreVariableName($original_var_name) === false) {
            $error = 'Variable "%s" is not in valid underscore name format';
            $data  = [$original_var_name];
            $phpcs_file->addError($error, $stack_ptr, 'NotUnderscore', $data);
        } elseif (preg_match('|\d|', $var_name) === 1) {