src/main/java/org/apache/log4j/xml/UtilLoggingXMLDecoder.java [106:137]:
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        } catch (ParserConfigurationException pce) {
            System.err.println("Unable to get document builder");
        }
    }

    /**
     * Sets an additionalProperty map, where each Key/Value pair is
     * automatically added to each LoggingEvent as it is decoded.
     * <p>
     * This is useful, say, to include the source file name of the Logging events
     *
     * @param properties additional properties
     */
    public void setAdditionalProperties(final Map properties) {
        this.additionalProperties = properties;
    }

    /**
     * Converts the LoggingEvent data in XML string format into an actual
     * XML Document class instance.
     *
     * @param data XML fragment
     * @return dom document
     */
    private Document parse(final String data) {
        if (docBuilder == null || data == null) {
            return null;
        }

        Document document = null;

        try {
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src/main/java/org/apache/log4j/xml/XMLDecoder.java [123:153]:
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        } catch (ParserConfigurationException pce) {
            System.err.println("Unable to get document builder");
        }
    }

    /**
     * Sets an additionalProperty map, where each Key/Value pair is
     * automatically added to each LoggingEvent as it is decoded.
     * <p>
     * This is useful, say, to include the source file name of the Logging events
     *
     * @param properties additional properties
     */
    public void setAdditionalProperties(final Map properties) {
        this.additionalProperties = properties;
    }

    /**
     * Converts the LoggingEvent data in XML string format into an actual
     * XML Document class instance.
     *
     * @param data XML fragment
     * @return dom document
     */
    private Document parse(final String data) {
        if (docBuilder == null || data == null) {
            return null;
        }
        Document document = null;

        try {
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