secondary
An array of configurations for secondary IP ranges for VM instances contained in this subnetwork. The primary IP of such VM must belong to the primary ipCidrRange of the subnetwork. The alias IPs may belong to either primary or secondary ranges. Note: This field uses attr-as-block mode to avoid breaking users during the 0.12 upgrade. To explicitly send a list of zero objects you must use the following syntax: 'example=[]' For more details about this behavior, see [this
section](https://www.terraform.io/docs/configuration/attr-as-blocks.html#defining-a-fixed-object-collection-value).