NodeImageSelection interface  
The node image upgrade to be applied to the target nodes in update run.
Properties
| custom | 
	Custom node image versions to upgrade the nodes to. This field is required if node image selection type is Custom. Otherwise, it must be empty. For each node image family (e.g., 'AKSUbuntu-1804gen2containerd'), this field can contain at most one version (e.g., only one of 'AKSUbuntu-1804gen2containerd-2023.01.12' or 'AKSUbuntu-1804gen2containerd-2023.02.12', not both). If the nodes belong to a family without a matching image version in this field, they are not upgraded.  | 
| type | The node image upgrade type.  | 
Property Details
		customNodeImageVersions
	   
	Custom node image versions to upgrade the nodes to. This field is required if node image selection type is Custom. Otherwise, it must be empty. For each node image family (e.g., 'AKSUbuntu-1804gen2containerd'), this field can contain at most one version (e.g., only one of 'AKSUbuntu-1804gen2containerd-2023.01.12' or 'AKSUbuntu-1804gen2containerd-2023.02.12', not both). If the nodes belong to a family without a matching image version in this field, they are not upgraded.
customNodeImageVersions?: NodeImageVersion[]
				Property Value
type
The node image upgrade type.
type: string
				Property Value
string