iothub/device/iot-device-client/src/main/java/com/microsoft/azure/sdk/iot/device/transport/https/HttpsResponse.java [110:119]:
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    private static String canonicalizeFieldName(String field)
    {
        String canonicalizedField = field;
        if (canonicalizedField != null)
        {
            canonicalizedField = field.toLowerCase();
        }

        return canonicalizedField;
    }
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provisioning/provisioning-service-client/src/main/java/com/microsoft/azure/sdk/iot/provisioning/service/transport/https/HttpResponse.java [136:145]:
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    private static String canonicalizeFieldName(String field)
    {
        String canonicalizedField = field;
        if (canonicalizedField != null)
        {
            canonicalizedField = field.toLowerCase();
        }

        return canonicalizedField;
    }
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provisioning/provisioning-device-client/src/main/java/com/microsoft/azure/sdk/iot/provisioning/device/transport/https/HttpResponse.java [129:138]:
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    private static String canonicalizeFieldName(String field)
    {
        String canonicalizedField = field;
        if (canonicalizedField != null)
        {
            canonicalizedField = field.toLowerCase();
        }

        return canonicalizedField;
    }
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