public void setPlacement(PlacementType placement) {
        this.placement = placement;
    }
<p>
The Amazon EC2 Availability Zone for the cluster.
</p>

@param placement
       The Amazon EC2 Availability Zone for the cluster.
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/model/JobFlowInstancesDetail.java