Openapi Subnet Mapping Structure

{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/amazon-network-firewall/refs/heads/main/json-structure/openapi-subnet-mapping-structure.json",
  "name": "SubnetMapping",
  "description": "The ID for a subnet that you want to associate with the firewall. This is used with <a>CreateFirewall</a> and <a>AssociateSubnets</a>. Network Firewall creates an instance of the associated firewall in each subnet that you specify, to filter traffic in the subnet's Availability Zone.",
  "type": "object",
  "properties": {
    "SubnetId": {
      "allOf": [
        {
          "$ref": "#/components/schemas/CollectionMember_String"
        },
        {
          "description": "The unique identifier for the subnet. "
        }
      ]
    },
    "IPAddressType": {
      "allOf": [
        {
          "$ref": "#/components/schemas/IPAddressType"
        },
        {
          "description": "The subnet's IP address type. You can't change the IP address type after you create the subnet."
        }
      ]
    }
  },
  "required": [
    "SubnetId"
  ]
}