return session;
    }

    private static final char[] hexCode = "0123456789ABCDEF".toCharArray();

    private static String printHexBinary(byte[] data) {
        StringBuilder r = new StringBuilder(data.length * 2);
        for (byte b : data) {
            r.append(hexCode[(b >> 4) & 0xF]);
            r.append(hexCode[(b & 0xF)]);
        }
        return r.toString();
    }

            List<BuilderProblem> problems,
            BuilderProblem.Severity severity,
            String fieldName,
            String sourceHint,
            String message) {
        StringBuilder buffer = new StringBuilder(256);
        buffer.append('\'').append(fieldName).append('\'');

        if (sourceHint != null) {
            buffer.append(" for ").append(sourceHint);
        }

        }

        private String appendPath(String parentUrl, String childPath, String pathAdjustment) {
            StringBuilder url = new StringBuilder(parentUrl.length()
                    + pathAdjustment.length()
                    + childPath.length()
                    + (pathAdjustment.isEmpty() ? 1 : 2));

            url.append(parentUrl);