static String stripQuotes(String value) {
        if (value == null) {
            return value;
        }
        StringBuilder buffer = new StringBuilder(value.trim());
        if (buffer.length() > 0 && buffer.charAt(0) == '"') {
            buffer.deleteCharAt(0);
        }
        if (buffer.length() > 0 && buffer.charAt(buffer.length() - 1) == '"') {
            buffer.setLength(buffer.length() - 1);
        }
        return buffer.toString();
    }
Strips the quotes before or after the value, if present.
config-lib/src/main/java/com/yahoo/config/ReferenceNode.java