public void setSubnetId(String subnetId) {
        this.subnetId = subnetId;
    }
<p>
The ID of the subnet to add the mount target in. For One Zone file systems, use the subnet that is associated
with the file system's Availability Zone.
</p>

@param subnetId
       The ID of the subnet to add the mount target in. For One Zone file systems, use the subnet that is
       associated with the file system's Availability Zone.
aws-java-sdk-efs/src/main/java/com/amazonaws/services/elasticfilesystem/model/CreateMountTargetRequest.java