public static String buildRealNode(final String nodePath, final String nodeName) {
        return String.join(SEPARATOR, nodePath, nodeName);
    }
Build real node string.

@param nodePath the node path
@param nodeName the node name
@return the string
shenyu-register-center/shenyu-register-common/src/main/java/org/apache/shenyu/register/common/path/RegisterPathConstants.java