public static <T> String toStringWithoutClassName(final T obj) {
        if (obj == null) {
            return null;
        } else {
            String str = obj.toString();
            if (!str.isBlank()) {
                try {
                    final String className = obj.getClass().getSimpleName();
                    if (str.startsWith(obj.getClass().getSimpleName())) {
                        str = str.replace(className, "");
                    }
                    if (str.startsWith("{") && str.endsWith("}")) {
                        str = str.substring(1, str.length() - 1);
                    }
                } catch (Exception e) {
                    LOGGER.error("Error stripping class name from {}", obj, e);
                    return str;
                }
            }
            return str;
        }
    }
toString() methods often are of the form 'MyClass{xxx}', so this method
converts that to just 'xxx'
stroom-util/src/main/java/stroom/util/logging/LogUtil.java