iothub/device/iot-device-client/src/main/java/com/microsoft/azure/sdk/iot/device/transport/https/HttpsResponse.java [92:131]:
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    public Map<String, String> getHeaderFields()
    {
        Map<String, String> headerFieldsCopy = new HashMap<>();
        headerFieldsCopy.putAll(this.headerFields);

        return headerFieldsCopy;
    }

    /**
     * Getter for the error reason.
     *
     * @return the error reason.
     */
    public byte[] getErrorReason()
    {
        return this.errorReason;
    }

    private static String canonicalizeFieldName(String field)
    {
        String canonicalizedField = field;
        if (canonicalizedField != null)
        {
            canonicalizedField = field.toLowerCase();
        }

        return canonicalizedField;
    }

    private static String flattenValuesList(List<String> values)
    {
        StringBuilder valuesStr = new StringBuilder();
        for (String value : values)
        {
            valuesStr.append(value).append(",");
        }
        // remove the trailing comma.
        valuesStr = new StringBuilder(valuesStr.substring(0, Math.max(0, valuesStr.length() - 1)));

        return valuesStr.toString();
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provisioning/provisioning-device-client/src/main/java/com/microsoft/azure/sdk/iot/provisioning/device/transport/https/HttpResponse.java [111:150]:
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    public Map<String, String> getHeaderFields()
    {
        Map<String, String> headerFieldsCopy = new HashMap<>();
        headerFieldsCopy.putAll(this.headerFields);

        return headerFieldsCopy;
    }

    /**
     * Getter for the error reason.
     *
     * @return The error reason.
     */
    public byte[] getErrorReason()
    {
        return this.errorReason;
    }

    private static String canonicalizeFieldName(String field)
    {
        String canonicalizedField = field;
        if (canonicalizedField != null)
        {
            canonicalizedField = field.toLowerCase();
        }

        return canonicalizedField;
    }

    private static String flattenValuesList(List<String> values)
    {
        StringBuilder valuesStr = new StringBuilder();
        for (String value : values)
        {
            valuesStr.append(value).append(",");
        }
        // remove the trailing comma.
        valuesStr = new StringBuilder(valuesStr.substring(0, Math.max(0, valuesStr.length() - 1)));

        return valuesStr.toString();
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