How can I make mutuls-cni dynamically specify only one type of cni?

[acechef]

How can I make mutuls-cni dynamically specify a certain type of cni, such as flannel or calico, so that there is only one network interface in the Pod.

[dougbtv]

Without any annotation on a pod, multus will only plumb "the default interface", like whatever the cluster is configured with by default