src/main/java/org/apache/log4j/LogMF.java [234:263]:
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            return pattern;
        }
    }


    /**
     * Formats arguments using MessageFormat using a pattern from
     * a resource bundle.
     * @param resourceBundleName name of resource bundle, may be null.
     * @param key key for pattern in resource bundle, may be null.
     * @param arguments arguments, may be null or mismatched.
     * @return Message string or null
     */
    private static String format(
            final String resourceBundleName,
            final String key,
            final Object[] arguments) {
        String pattern;
        if (resourceBundleName != null) {
            try {
                ResourceBundle bundle =
                        ResourceBundle.getBundle(resourceBundleName);
                pattern = bundle.getString(key);
            } catch (Exception ex) {
                pattern = key;
            }
        } else {
            pattern = key;
        }
        return format(pattern, arguments);
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src/main/java/org/apache/log4j/LogSF.java [101:128]:
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        return pattern;
    }

    /**
     * Formats arguments using MessageFormat using a pattern from
     * a resource bundle.
     * @param resourceBundleName name of resource bundle, may be null.
     * @param key key for pattern in resource bundle, may be null.
     * @param arguments arguments, may be null or mismatched.
     * @return Message string or null
     */
    private static String format(
            final String resourceBundleName,
            final String key,
            final Object[] arguments) {
        String pattern;
        if (resourceBundleName != null) {
            try {
                ResourceBundle bundle =
                        ResourceBundle.getBundle(resourceBundleName);
                pattern = bundle.getString(key);
            } catch (Exception ex) {
                pattern = key;
            }
        } else {
            pattern = key;
        }
        return format(pattern, arguments);
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