tagResource

// This operation tags an Amazon FSx resource.
fSxClient.tagResource {
    resourceArn = "arn:aws:fsx:us-east-1:012345678912:file-system/fs-0498eed5fe91001ec"
    tags = listOf<Tag>(
        Tag {
            key = "Name"
            value = "MyFileSystem"
        }            
    )
}