public void setSubnetIds(java.util.Collection<String> subnetIds) {
        if (subnetIds == null) {
            this.subnetIds = null;
            return;
        }

        this.subnetIds = new java.util.ArrayList<String>(subnetIds);
    }
<p>
A list of subnet IDs associated with the VPC endpoints for the domain. If your domain uses multiple Availability
Zones, you need to provide two subnet IDs, one per zone. Otherwise, provide only one.
</p>

@param subnetIds
       A list of subnet IDs associated with the VPC endpoints for the domain. If your domain uses multiple
       Availability Zones, you need to provide two subnet IDs, one per zone. Otherwise, provide only one.
aws-java-sdk-opensearch/src/main/java/com/amazonaws/services/opensearch/model/VPCOptions.java