src/main/java/org/jenkinsci/plugins/awsdevicefarm/AWSDeviceFarmTestResult.java [116:125]:
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        if (ChartUtil.awtProblemCause != null) {
            response.sendRedirect2(String.format("%s/images/headless.png", request.getContextPath()));
            return;
        }

        // Check the "If-Modified-Since" header and abort if we don't need re-create the graph.
        if (isCompleted()) {
            Calendar timestamp = getOwner().getTimestamp();
            if (request.checkIfModified(timestamp, response)) {
                return;
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src/main/java/org/jenkinsci/plugins/awsdevicefarm/AWSDeviceFarmTestResult.java [144:153]:
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        if (ChartUtil.awtProblemCause != null) {
            response.sendRedirect2(String.format("%s/images/headless.png", request.getContextPath()));
            return;
        }

        // Check the "If-Modified-Since" header and abort if we don't need re-create the graph.
        if (isCompleted()) {
            Calendar timestamp = getOwner().getTimestamp();
            if (request.checkIfModified(timestamp, response)) {
                return;
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