[NetworkLoadBalancer] Definitions are missing in the SDK #852

I work with different resource types and rely on proper typing in the SDK.
NetworkLoadBalancers define a health checker and this health checker defines DNS Details.
The parameter rcodes is defined like this:

        :param rcodes:
            The value to assign to the rcodes property of this DnsHealthCheckerDetails.
        :type rcodes: list[oci.network_load_balancer.models.DnsHealthCheckRCodes]

but the related type oci.network_load_balancer.models.DnsHealthCheckRCodes does not exist.

The property let me guess that this is a string:

    @property
    def rcodes(self):
        """
        Gets the rcodes of this DnsHealthCheckerDetails.
        An array that represents accepetable RCODE values for DNS query response.
        Example: [\"NOERROR\", \"NXDOMAIN\"]

Looking at the go definition, this is actually an enumeration.
Ideally this would be reflected correctly in the python SDK as well.